When the playoffs roll around, our rotation is going to consist of the starters + 1 backup pg, 1 backup wing and 1 backup big. So if House is going to play, he is going to have to be the backup pg and a Pruitt/House backcourt isn't going to work when it matters. The backup wing is going to have to be able to guard guys like Joe Johnson, Dwyane Wade, Kobe Bryant, Lebron James, etc. and neither Pruitt or House can do that.
I also think that when Scal comes back, the bench is going to look better. Part of the problem of the 2nd unit right now is that we have only 2 shooters on the floor with House and Pierce/Ray. TA and Powe don't really have any range and Baby is unreliable right now. Putting Scal (or a guy like Joe Smith if we can get him) will improve the spacing and make the 2nd unit function better.