Wasn't there already 2 wolves for 10 players, which translates to 20%, which is the threshold for vanilla average numbers?

I imagine there'll be a lot of deaths with a killing seer and wolves with one kill each. Let's see...

20 players. 4 wolves, 2 seer-killers, 2 baners. It looks like a really fast-paced but not necessarily that unbalanced(in the beginning) game. With a lucky night one, either one of the teams can utterly devastate the other, though.