I think both should get more PT.
Matt and of course Nazr should be getting the bulk of McInnis' minutes. Matt needs those minutes to get back in the shooting groove or get more comfortable with the "offense" that we run. He's shown that when he has time to get himself into the game, that he can perform (before getting taken out for Jeff, of course). I don't want to go into next season (or the next 5) without a confident Matt Carroll.
As far as Dudley is concerned, what a great potential talent we have in him. He gives 110% every time he's on the floor, fighting for rebounds, steals, etc. He should be getting all the minutes we can afford him.