I actually think T-Mac could be a nice backup point guard to play alongside Hill and give a similar type of look you get with Manu, if you just looked on the surface of skill-set and talent. But I want no part of his excuse-making, hangnail-notifying, ain't-never-done-nothin', piss-poor at ude.
Unfortunately, for as talented and useful as he still could be, the guy's basically cancer. Not in the conventional way you'd use that term but you can't count on him to be on the court (which effects players and coaches alike) and his at ude, in general, just finds a way to bring down the room.
It's a shame. He really could be helpful to a team like the Spurs.