Not wild about filling rotation with mediocre players. I mean Biyombo wouldn't play more than 15-20 minutes here. Is this really the best place for him to develop? Competing with Sullinger, Olynyk and others? That doesn't fill me with confidence.
Biyombo is averaging 10 minutes a game or so these days playing behind Al Jefferson. I don't expect that to change much in upcoming seasons.
Meanwhile, on the Celtics, I expect Humphries and Bass to be gone after this summer, meaning there will be some openings in the big man rotation. Barring the acquisition of a guy like Asik, or the Celtics drafting Embiid, I think there will be a place for a big man who can defend the rim, even if he has major shortcomings in other areas.
Wouldn't Biyombo develop better playing 15-20 minutes a game on the Celtics (a team that can tolerate some mistakes from younger players), rather than erratic, severely limited minutes in Charlotte -- a playoff team with an All-Star caliber center?
I think Biyombo's role in Charlotte is roughly the same as he'd have here in Boston.
Would Biyombo be better off in Boston than Charlotte? I don't know. I don't view either place as an ideal situation for him.
I don't like having multiple young guys competing for same minutes. I don't think Biyombo is far enough in his development to establish himself against guys like Sullinger and Olynyk (and whatever other bigs are here) to carve out a solid role for himself. Biyombo is still too raw to accomplish that. If that changes, down the road, then I would revisit the idea of acquiring Biyombo.
Edit: Biyombo is still learning how to be effective as an undersized (6-9, 240lbs) defensive orientated center. He hasn't figured that out yet. That is why he is an ineffective option as a starting center and his role would be that of a backup C playing small minutes on whatever team he plays on. Biyombo is not even a particularly good backup C. A mediocre one. He needs more work before he is ready for a larger role + responsibilities. I don't think this is a good time in his career to acquire a player like that. At this stage in his career, I think teams should continue to monitor him and if Biyombo shows some progress, then they should consider making a move for him. But not right now. Too raw.