If Rondo's gonna leave, he's gonna leave.
I believe him when he says he likes Boston and is comfortable there. Clearly, he has bonded with guys like Avery, has earned the Captain title and has comfort within the organization.
He knows Stevens is a good coach, DA is a good GM and there are good things to come for the franchise. If he opts to go elsewhere in free agency and not leave via trade it will hurt, but not colossally so.
I'm pretty sure he'll start the season here and will be back to his old self, only better.