IMO Quora started great but now they are trying to do too much.
So, I would just pick up Quora and would start to remove things. After you remove A LOT of stuff, remove more.
I would also try to create a single reply per question (kind of what RapGenius does for lyrics) needed time to think a way to make this work properly but I think there is something interesting that can be done there because most of the time you end up having to read a bunch of answers to get to a conclusion.
But essentially I would remove stuff and would start with a niche.