With all the talk of the Funny Girl art, I've finally realized that aside from Cabaret (and other Kander and Ebb shows), it reminds me of The Cher Show. But that comparison helps highlight what's offputting about the Funny Girl art. If you didn't have two Chers in profile, I would also focus on the weird nose like the choice to go with only nostrils in FG. Cher's dark hair justifies the black background where FG needs the big bow. Unlike the fun pops of color from TCS that create unity, you have that garish yellow, but you don't need the harsh spotlight, even worse with the white face, if you're not using a black background.