Wow. I disagree with so much stuff here, I guess my play style is very different to yours'.
Let's start with MW. Are you guys aware that KB triggers corrosion too? So if you prep a Bearmace in addition, you get twice the value out of it on regenfighters? Unfortunately it does not combo with the Sorcerer's mana shield (would lead to a beautiful dwarf strategy) nor with the Gorgon's DG - bit of an inconsistency.
It's sad that Goblins specifically combo unfavorably with it, but the item already works really well on some things. The tweak would make it a 2nd BM Ring which also gets around MR. Now you need to work for it's effect a bit - either reveal a great deal of the dungeon to constantly corrode everything important, or spend health and blackspace to reach the desired corrosion level. Are you a caster with low attrition, but some unneeded blackspace? Smack your boss a few times, and if you have Whurgarbl apply burning stacks at it as well.
If MW corroded hidden stuff, it would favor underexplorers (including regenfighters) too much.
Btw MW is still a fantastic lvl1 bosskilling tool. Here I was only 4 corrosions away from brawling down the boss just with my '2 bars'.
http://postimg.org/image/q8sdjqh4p/http://postimg.org/image/j6meoveid/I'm unsure what to say about TT. On one hand early worship is finicky (especially if prepped), on the other hand he acts as a lock on the most powerful feature in the game - poison strike - and making that boon easier to spam and keep can be dangerous.
Joining him later, when you already leveled up a bit, have popcorn to waste and gold to spend does work out. Also at low levels you couldn't get much mileage out of TT, so why do you want to join him? TT does not help building your character stronger (besides with poisonstrike, but using it this soon will backfire), taking learning is meaningless (it's effect on higher level monsters is negligible, and you don't have much popcorn yet).
Even though poisonstrike in nerfed, you can still stack it to levels where it acts as a general solution to everything. Against the few counters you have the Potions boon.
On topic of MA, I'm not sure what you mean by "glyph spam lead to more glyph spam". If you refer to the max mana increase, that's subtle on level ups and irrelevant during exploration.
I disagree about MA being too good. Straightforward to handle? Yes, as a tutorial god should be. But JJ and TT can outperform her with right amount of dedication. Not to mention that she is kinda a one-trick-pony, while every other god (except Taurog) has more flexibility and lends itself well to different strategies.
I would not touch her prep penalty, since from all the gods only 2 have more impactful penalties (GG, TT).
I'll skip the halfling vs gnome debate now, or else I'll never finish this textwall

Funnily Gnome Sorcerers don't make elves look bad. You did find one specific spellcaster build that takes very little effort to use well, and I'm happy it exists, since apart from it and Bloodmages (who by the end don't really feel like casters) no build is optimal for Gnomes. Wizards, Assasins, Fighters are all better off being elves. Warlords who have a potion based ability are best used with melee races, and spike stronger/have more flexibility as elves.
The thing that makes elves truly awesome is that they spike harder and thanks to the high level kills they pull off they save popcorn, generate more xp, reach higher levels and thanks to that become more powerful. They use dings better than anyone else and they are guaranteed to have a lot of dings. When you need a refill, just level catapult the 100% refill you get om bigass mana tanks is better than the gnomes' potions. If you feel the need, you could drink a potion with elves as well, but I have been using them parched for ages without hindrance.
I recommend using elves with JJ and combining mana boosts with their CP bonus. Contrary to expactations this lets them save blackspace too, they work like the caster versions of healtmonsters, manamonsters if you will.
With these builds I regularly reach 1-3 prestige and score 5-6 badges.
The XP req. for prestige dings continues to grow by 5xp. Whether these dings are worth it or not is somewhat opinion based. From another view prestige dings deal your maximum damage, so why settle for the weaker regular ones.
I agree that Goblins could do with some help, how about making their CP bonus give 5+2 stacking xp instead of changing of tweaking xp bars?
Also others raised very valid points about endurance runs.
About swift hands, if it didn't work on undead, that would be a start. I'm sure undeads don't need their organs.
Another limitation could be restricting swift hands to only remove 1 DP at a strike.
@Kami: I totally agree on Stone Sigil. +1 piety per kill is very tame, even under the stingiest dieties. It also takes popcorn and a lot of time to extract it's benfits, and if you convert during play the bonuses you collected gets halved.
Lower price and/or higher CP is what I'd like on it. This is the only item in the game that regardless of the strat I play always stays vetoed.
I see a lot of players think gnomes are straight up better than elves, and it may be because they are measuring them in MA standards. MA in not the main god you should be using with them in most cases, but rather JJ.
Wizards have small glyphs so they dodge the prep penalty, the casting cost reduction makes them crazy efficient piety generators with bysseps and gettindare. Glyph sense let's you save blackspace.
For once, the Fighter's monster sensing is useful, it let's you find peakaboo targets easily, but also helps you avoid punishments for the short time you're saving up for petition and gathering mana for your 1st kill. The starting 1 point of learning and smaller xp bar let's you enjoy your huge refills more often.
I bet you can imagine what is the point in playing huge mana assassins.
It's another point in JJ's favor that prepping him doesn't make him less powerful, unlike with MA, so you still have the opportunity to convert out and further boost your characters under other gods. Less inventory space is not really an issue when you want to squeeze out all the benefits of your glyphs anyways, and MA would discourage that.
I could also make a point for most spellcasting items working better under elves than gnomes.
The mighty 25 mana was brought up. For elves that's merely a starting point. You can expect 36-50 with them.
The way I see it is elves demand more strategic play but in turn are stronger. Gnomes are really good for playing casually, this is what makes them hard to judge.
I agree with Tinker about Dwarfs needing a buff. Despite being a race who gets permanent benefits, most of the time you don't feel their bonus helpful at all even in big chunks. A little extra damage/mana on the other hand can tip off the scale when you are looking for a high level kill.
I have similar sentiments about GG and Enlightenment too. I think his piety generation is fine when you run across him, but for a prepped one it's awful. If it gave 2/3 of his normal piety on levelups (instead of starting with 0) he would be fine.
Dracul is a very interesting deity in terms of piety management. He starts out stingy, but lifesteal improves his kill based piety farming, and the more sanguine you stack up without drinking pools, the more piety will you make out of those. That's why I often take Blood Curse strategically, even though i hate the effect. The early investment can greatly pay out and you could turn Dracul into a piety farm with +3-5 gains on blood drinking.
I'm reluctant on straight up buffing Dracul with a weaker penalty. Whenever I find Dracul he gives me the feeling that I cannot lose (thanks to his monstrous healing boons). So while an early Dracul is not a real benefit, but a 100% guaranteed Dracul vs. a probable one is an upgrade.
I do feel you Darvin about lifesteal stats needing encouragement, so it would be good if bosses were an exception to the bloodless trait. It's reasonable since you can still score Bleaty, Tower of Goo, or an undead boss. But aside form it, I'd leave the penalty as it is.
There's still plenty of things I'd contribute to, but don't have the time.
Dam my slow typing and wonky keyboard.