"Very small"? He's absolutely fine.
I've seen the play twice now - once paid for where Kit was performing, and I managed to get on the list for a free understudy performance (thought it was going to be Kit's understudy but to my pleasant surprise it was Kit again).
Front row both times. His penis is perfectly fine. Porn has definitely messed up people's perception/expectations. Unless there's a donkey dick up there swinging, gays are always going to call it "small". He's not small, he's not very small, he's average. Which isn't a bad thing.
Getting to see Kit's penis up close again was just as pleasing as the first time. Especially since my second viewing cost me nothing haha