MU was basically saying in a radio show that Salmons and Hayes both brought something really positive to the locker room. Salmons was a huge disappointment on the court but a part of the reason why they got to 48 wins and had a fairly dominant second half was because of team chemistry.
Personally I don't think he should be back.. $6M is a lot of coin to keep around for team happiness. But I do think he had a positive impact on this team even if it wasn't on the court.
If he had a good impact on the team MU would probably keep him on a minimum deal, but those millions are waaaay too much.