Maybe this is too early and really need a lot more time to test the waters. But while I was really keen on an SE for Martial arts, now that we have it, I'm not sure it works too well.
A Lot of the questions don't seem that good, or they have legitimate concerns, but are better served with subjective discussion and opinion. The ones definitive answers can usually be answered by googling it.
We have a big limit, we can't post 'code'. Which is the majority of 'stackoverflow' type questions, hey, I'm trying to X, whats going wrong? why does this happen? I just can't make it work? I can't find something that will do Y.
I think this might be represented by the fact we don't have a lot of questions getting generated by current users. And the questions we are getting are starting to get odd.