It's really frustrating, because it's hard to say if you have time to drink with denounce spam or not. If the answer is no, you used precious mana for denounce for no help at all. I tried again if something is changed and get to drink after 10th wave but even with denounce spam whole way from 10 to 20 I didn't have a chance to drink after 20th wave. Because of denounce I didn't have the mana and wiped at 28th wave. Maybe I would have had enough mana if I didn't denounce, hard to say.
Anyway, it feels a lot harder now, however, it is hard to say because I didn't try before the hotfix.
PS. I would even be fine with not being able to drink at all at any point. It would be alright but the problem comes when the previous wave isn't even remotely dead before the next one (handling 4 fireball casters with 2 rabbits is not nice).