Avery Bradley was a key player for us, and an absolute god send. I'm really going to miss him. I loved watching his defensive intensity, and how much scared opposing point guards would look when being guarded by him, lol. (Looking at you Jameer Nelson!)
But like others said, writing was on the wall, Bradley was going to eventually get the contract that he wanted and most likely at least get a fat check. I can see 18-20 million range for him, or maybe a little more, with bonus incentives. And in order to build a strong team, you can't be paying players like Bradley unless you already have the championship roster built. Bradley is your 3rd option on a really good team.
I would wager the option of getting rid of Smart, or Crowder was on the table. But Crowder wasn't going to leave, because of his useful bargain bin contract, and Rozier wouldn't even have made an difference cap wise.
Bradley would've been perfect, but he would've also been another undersized player on our team. I think we're just really in need of one good big man that fits our system well.