Despite low ratings, I still use sportsbook.ag because of their great bonuses and the fact that bitcoin payouts are slow (up to 2 weeks) but reliable.
One concern I have is that they have no link for new users to register. They only service existing users. This has been the case for months. I wonder if this is a precursor to just shutting down shop and taking everyone's balance.
You never know what the situation is but I think most books are gearing up for full US legalisation. They don't want to do anything that might jeopardise their ability to gain a licence, assuming licencing is what happens.