Truth is simple IMHO, what do you think how would chucker like carmelo play in this type of celtic system? I think he d be worse than charlie sheens habbits. I think we saw over last few years the team as a whole moving to more modern up to speed run (but without the gun) type of game while still retaining strongest defence in the league.
All of those things are not Rays forte and once he come to that conclusion (unproven sophmore fitting better than him)it was over with ray and C's. Sadly.
Next was the place where his best qualities could come out, and out of all the interested teams cHeat style wil fit him best.
Torn between legacy and proving that he is still a top player and not 7th option on a team that doesn't fit him, and has continued to play him trough his struggles only cause Doc is stubborn as hell with his rotations he choose his Pride (not ego but pride as a player) and I can't blame him for that even if it is the team that almost made him cry on presser just few months back.
In the end I think C's are better of without distractions on Sg spot, AB wil now have his chance with former 6th man of the year coming of the bench, and Ray with have a picnic day being 3rd option (before Bosh) on Heat team that is built to suit sharpshoters with half of his talent.
My take on traitor or not, is not, simply cause it was obvious that enough reasons for him to go were there, and unlike others I really don't hate on other teams, I couldn't care less where you play if its not celtics green, same goes for MIA, La or w/e.