I wouldn't read too much into the credits with Lisa. In the same opening titles, Joe shares his scene with Nathan...and there's no indication that they're going to become pals. They've barely interacted as well.
As for Scott, he seems more like a recurring character these days. He was becoming a bit more tolerable when he was with John Paul, but with them split up it's hard to see what to do with him. He's like HO's answer to Sean Tully but even worse. With that gobby cow Sinead long gone and Diane away for a bit there's literally no one connected to him in the village. He needs to go.