I still think a big reason why Ray left is because his relationship with Rondo went sour. Rondo doesn't exactly seem like the easiest guy to get along with, and if you can't get along with the starting PG, it probably made it tough for Ray to come. I'm not saying that's the only reason, but I wouldn't be surprised if it was a huge part in his decision making.
I thought ad was nice gesture by him. He played hard and hurt for us. Most players probably wouldn't be playing with bone spurs knowing they would be a free agent soon.