It's not like he would have a better role on Miami than say the Cs or the Lakers....
He can easily start in Miami. Wade will play PG defensively, and LeBron will be the PG offensively. I'd rather do that than have that headless chicken Chalmers in there.
I think Wade would get worn out trying to defend most decent PGs. Remember, most of them are unlike Rondo and can hit an open 15 footer. And just because Bron is a good passer, that doesn't mean he can run an offense.
Mike
He played PG for about 10 games last year and averaged double digit assists with a ast:to ratio of around 5:1 when Mo Williams was hurt, irrc.
I don't think Wade would pressure the ball most of the time so I don't think guarding a PG would wear him out anymore than guarding a SG would.
LeBron led the team in assists with and without Mo on the court and when Mo was hurt, LeBron played with two other guards in the backcourt for all but one game.
Wade won't have a quickness advantage against PGs, who will love putting him in pick-and-rolls.
Mike
Magic usually played with two other guards didn't he? LeBron can play the PG position at an all NBA level if that's where he is put by his coaching staff.
How many PGs have a quickness advantage on Wade? Not a whole lot, and he can adjust to guarding PGs if necessary. Do you really think he's a worse option that Mario Chalmers, Derek Fisher, Mo Williams, Shannon Brown, etc. that all were PGs defensively for playoff teams?