It's the GM's job to get useful player's at the position they play onto the roster. In other words get talent. I don't think Brewer (especially after knee surgery) is a talent at the wings because of shooting and lack of physicality.
Sloan's job is to play the players that help get wins and to get the most out of the talent he is given. For some reason Sloan falls in love with untalented but other wise hard working players. While not playing more talented players that maybe don't practice as hard as the less talented counterparts.
IE-Harpring continuing to play long past his expiration date and Collins playing at all ever. Brewer is another example of this. He was a huge offensive liability and hurt our team in the playoffs 2 years running. But continued to get more minutes than any other Jazz player not named Deron or Boozer.
Can't argue with Collins comparison. With that said, I posted you Brewer's numbers, and they are not bad. Definitely good numbers for a bench player. He is also not a bad defender, and is very athletic. All we need now is a bench wing. We already have our starters for next 3 years. I am not suggesting to pay him starter's money or start him (unless coach thinks he is better than alternatives), but be a bench player. I think it is really hard to argue with the numbers I provided - for bench player role.