Thank you for such detailed review!
I'm thinking on doing handcrafted levels and generated ones, either it will be special mode, or extra levels on the existing floor (unlocking for exploration), for those who want to explore more.
As for classes with their randomized hpmax, I'm planning on changing it to STR/DEX/INT randomness later.
Poisoner/Firestarter difference is that the 1st is going for more on dotting and debuffing, will have options to work with weapons as well, and the 2nd is more like mage caster (will have castable skills), will have his ways to go either for fast dotting, or for instant damage focus, or something like that.
And yes, I have in plans to throw game on Steam some day, but I will have to do much more work before that :)