Love this feature! Well done
I agree with the suggestions done so far. Some suggestions:
1) add all the spellscrols to the stores
2) add class widgets: fighter, shifter, DD etc. I thik shifter is there, but would like to test fighter
3) +6 shields to test AC
4) regen ring or something, so wounding is not so annoying
5) heal kits
6) more item options to get ability scores maxed
7) some pots maybe, to test pot-based DR tanks?
different mobs, varying difficulty (as suggested above)