C+.
I know a lot of you guys are upset because he didn't swing some magician deal to find us a franchise centerpiece. But I see value in the fact that he didn't wildly overpay to move up in the draft. Would Winslow have been worth the pile of picks it reportedly would have taken to trade up for him? I say no.
He had a solid draft. Rozier and Hunter both have at least one identifiable NBA skill that will help them carve out a role in the league. Mickey could turn into something if his offensive game develops. Thornton's a scratch ticket, but you can see the tools.
I think we all had pipe dreams of getting a legit look from Aldridge, but while we haven't had any fireworks, Ainge also didn't make any mistakes. Crowder's contract will look like a sweetheart as soon as the new salary cap takes effect. Jerebko and Johnson are both short-term deals - they won't turn us into contenders but they also don't prevent us from signing the guys who could. They're off the books just in time for the second year of cap heaven free agency... or, if Ainge finds an opportunity before that, short-term deals are always relatively easy to move around.
An A or B grade would suggest that he got us closer to a return to contender status. To be completely honest, I don't think he did that. On the other hand, he didn't make a panic move just to be seen doing something. We still have a pile of decent young assets, we still have a pile of upcoming picks, and we still have a lot of financial flexibility. So a C+ feels right to me.