I'm not saying you're wrong, GKC - the stats don't lie - but Rudy was billed as an very good passer coming out of college. I think his lack of passing now probably has more to do with the team than his own ability.
I get the feeling Gay's ego would keep him from accepting a backup role on a team. If he would accept it for a few years, though, I'd love to have him. He could be our backup 3 for the next two years or so and could take over for Pierce when he's no longer our starter - a legit future building block to add to Rondo and Perkins. I also think KG's influence could do wonders for him, since the biggest negative on him coming out of college was inconsistency with his effort level, and that doesn't seem to have changed after watching him a bit over the last couple years.