I still don't see Robbie and Brad not working out, Brad knew that Robbie was faking the sex talk, and heard that he was only doing this because Neil was threatening Brad. I agree about him being more like JP. Seems JP was right about the family and it's secrets, and appropriately enough, Brad has taken them over in a very sure since.
Makes me wonder, though. With the abrupt change in Mouse's behavior, could Neil have threatened him (or JP's life more importantly) to get JP out of the picture, so that he couldn't interfere with his plans?