I still can't beat rock garden, and the indomitable is such a ridiculous stage. It's much harder than its predecessor, and it's full of the most annoying monsters in the game. I had to use potions just to beat the first monster.
I think that the game needs a serious overhaul of the difficulty. The devs/mods really need to respond directly to this, because as of right now, the casual gamer is being overlooked, and as a casual gamer, I'm just about done with DD til I see a patch notice on the RSS feed.
If I had to characterize this beta in one sentence it'd be, "Off to a running start that ended with a trip over its own leg and face plant into concrete."