Forget the whole "one-two-punch" theory. Sadly the team's best bet is Roy shutting it down for the year. If he stays in the lineup as is, a few things are going to happen whether as a starter or coming off the bench:
1) Roy by his nature takes a lot of shots, a lot of those come off the dribble with everybody else standing around waiting for a play to develop and usually against a set defense ... ultimately low percentage shots that I'd rather see other guys taking in the flow of the offense.
2) Roy playing for a few games then taking a few games off then back for a few more, makes building continuity almost impossible. This isn't going to go away just because Roy comes off the bench either.
3) I'm not sure his teammates like playing with him and right now and when he was a top ten player his production probably outweighs any chemistry hits, but with him looking like a barely adequate reserve player, the chemistry impact he's having on the team looks almost insurmountable.
Maybe we'll witness a miracle and he'll find a way to bounce back and also integrate his game, but I doubt it's going to happen this year. Brandon is going to have to first embrace (or at least accept) his situation with his knees and then it's going to take a lot of off-season work to reinvent himself into more of a post-up and catch-and-shoot player.