I get the feelings the writers just don't know what to do with Jaina. I'd be quite happy see her single as well and be the Sword of the Jedi. They have sort of put her character back on track at the end of LotF. I hope they continue. And she should be promoted to Master as she has shown maturity and control in "Invincible". And Leia should be as well IMO.

I like male slash when I feel that something in canon could actually lead to that. I dislike male slash that is just written for its own sake. But yeah, I'd rather go for het. As for femslash, I just don't see a lof of it in the fandoms I'm it. But I like it.