i wouldn't say that he doesn't create offense for anyone else... maybe not actively at least but there was that one play against portland where oden was scared of leaving morrow open in the corner, and it completely opened the lane for an easy layup. when he's hitting 4 of every 5 three's, it's going to spread the D, and demand one of the opponents better on-ball defenders...leaving a weaker defender on guys like jack, azu, CRAWFORD, etc.
having a guy who can shoot like that does help everyone else. He's not dropping dimes but defenses need to keep a man within 10 feet of him at all times and it opens up the floor for the rest of the players. If they leave Morrow they're gonna get burned.