I agree.
I appreciated that there was only one hero capable of drawing three cards in exchange for a single brain (Professor Brainstorm). And this move does not even bother me, since being a superpower, is a play that the opponent can only perform once in the whole game. However, thanks to Leprechaun Imp, your opponent also have the possibility to get three extra cards in exchange for a single brain, but up to 8 times in a game!!! This is already worrying.
Pot of Gold should give two cards for two brains, or three cards for three brains, but three cards for one wretched brain is quite destabilizing. The above, without considering that Leprechaun Imp has 2/2, which is quite good for a zombie that costs one brain.
