The thing is, I view Pruitt as part of that second unit -- right now Doc is only playing 4 of the 5 players on the 2nd unit. Pruitt should be brought in with the 2nd unit and all five should get burn. The problem is the Cs dont have a true backup SF, so PP is playing more than he should.
You mean all five bench players at the same time?
I *hate* lineups like that. Doc's 4-man bench lineups drive me nuts, and five bench players (naturally) is even worse. I think there should be no fewer than two starters (and one member of the big three) on the floor at all times. 82games.com did a study a couple of years ago, which showed that teams tend to get dominated when they have 4 and 5 bench players in the game at the same time.
I don't think basketball is a game where "line changes" works well. It's much better to have at least two or three players who are into the flow of the game stay on the floor. Also, of course, the starters are the best players on the team, and they have an amplifying effect on the players around them; the more starters that are on the floor, the better the team -- including the individual bench players -- will play.
That has nothing to do with whether Pruitt should see some time, though. I'd like to see him get some minutes. (I don't necessarily buy that Pruitt hasn't earned the minutes in practice, though. We've seen in the past that there are talented players who don't necessarily get minutes.)