The dialogue of a couple of the characters definitely seems like 10 is not the end, but it seems like they're working on fleshing out the other systems before pushing the others past 10.
Edit: besides how I think it'll be from the context, I also personally hope that 10 isn't the end either. I hate when these kind of games skimp out right at the good parts.
Double Edit: there's a previous post from the author talking about 11+ content so that seems like confirmation to me.