Thank you for the new non-sticky-clicky item interface; this is the feature I've been waiting for since the beta began, and didn't even realize it. Gone are the days when an inadvertent quaff, when I had meant to convert, would anger GG and prematurely end a run. Hooray!
I can confirm that the revised puzzle is working properly.
Crusaders feel a lot more balanced with +25% damage. Although I'm still holding out for death gaze and reduce resist immunity.
JJ is not as obnoxious as he was before, but also less interesting. At the moment, the only way I can see to use him is to repeatedly cast whatever is the cheapest glyph I have, then take Petition at 50 piety, then take Chaos Avatar at 100 piety, then either hold out for Last Resort or convert to someone else. Which is a fairly boring strategy, but unfortunately even with the reduced rate of mutation you're almost always going to end up with too many penalties to do anything but build up to Chaos Avatar. The potion boons might be useful at low levels, but not until the corrosion/weakness is all removed, and by that point they're not worth the tradeoff.
I'd kind of like to see JJ act more like Patches, with both negative and positive random changes; maybe also make mutations optional, allowing for more diverse strategies with him. Perhaps change his normal piety granting scheme to a random value between -1 and +5, with no negative effects (with a minor negative effect, like HP/MP drain, as a penalty for going below 0); then replace Petition with Polymorph, which for 5 (?) piety (repeatable) will cause some random effect to the player (+/- base damage/weakness, +/- corrosion/shield, +/- resistance, +/- bonus damage, +/- max HP/MP, cause/cure posion/mana burn, drain health).
Have only seen Pactmaker once thus far, but that list of pacts doesn't look too appealing. As others have noted, most deities are pretty easy to get piety for (the JJ strategy I outlined above requires 150 piety before you do anything, and I've never had trouble pulling it off [unless JJ decides to be a dick and inflict mana burn]). If Pactmaker takes up an altar, that means that (for most classes, in most dungeons) you'd only have two deities who actually grant boons, making your odds of getting the deity you want in any given situation much lower. Maybe Pactmaker should spawn in addition to the usual three altars you get? Maybe for some or all deities, instead of (or in addition to) giving you more piety, he can increase the potency of certain boons? (E.g., Mystera + Pactmaker lets you take Magic without enemies getting extra resist, but as a penalty you pay 2 xp every time you take the boon.)