Regarding accessibility, I think it would be good if more things could be identifiable by something besides color. Most importantly, anyone who multiclasses into Thief should get a bit more than just a muted outfit color. Maybe a hood or a bandana? I'd also like to see the formulas you mix get unique containers evocative of their effects, but at least that one can wait a bit since you can just inspect them if you forget which one does which.