Let's look at every meaningful transaction Boston has made since the KG/PP trade.
1. Sent Courtney Lee to Memphis for Jerryd Bayless
Reason: Cleared off Lee's long-term deal for an expiring so we would have more space to work with. Good move.
2. Traded Jordan Crawford (whom Stevens single-handedly got a player of the week award) for a conditional first round pick.
Reason: Got an asset for a player who was not part of our future, and isn't even in the league anymore. Good move.
3. Selected Marcus Smart, and James Young in the 2014 draft.
Reason: Ainge thought they were BPA, and it's too early to argue with him. Smart has shown more than guy's drafted after him e.g. Vonleh. And most of us were high on Young at the time of the draft too, only 19 years old, gotta give him some time. Good move.
4. Acquired Marcus Thornton, Tyler Zeller and a first round pick, and all we gave up was a trade exception. No explanation require here. Great move.
5. Re-signed Avery Bradley to a deal that will look really good when the cap goes up. And it isn't even bad value now - remember teams were offering up first round picks at the deadline for AB. It's a valuable deal. Good move.
6. Signed Evan Turner to a cheap deal, and he showed enough last season to prove it was worth it. I'm interested to see if Ainge can flip him in the coming months. Good move.
7. Got rid of the Joel Anthony contract for Will Bynum.
Reason: Helped our cap. A small, but a good move. Anthony was just dead salary.
8. Traded Rondo for Nelson, Crowder, Wright and a first round pick.
Reason: We weren't going to re-sign Rondo, and he was showing signs of a heavy decline anyway. Looking back on it, getting the first round pick alone was good value for Rondo, let alone Crowder who we know now is a really productive role player. Great move.
9. Traded Brandon Wright for a first round pick
Reason: Ainge managed to somehow get a first round pick, for an expiring contract. Good move.
10. Sent Jeff Green to Memphis for a first round pick and Tayshaun Prince.
Reason: Green wasn't playing well for us, and Ainge still managed to get a first round pick for him. He ended up somewhat falling out of the rotation with Memphis. Great move.
11. Acquired Isaiah Thomas for Marcus Thornton and Cleveland's first round pick.
Reason: Isaiah Thomas is a really good player, on a bargain deal, and all Ainge had to give up was an expiring and a low first. Great move.
12. Sent Tayshaun Prince to Detroit for Jerebko and Datome.
Reason: I think we saw in the last half of the season that Jerebko is a decent role player, and a much better fit than Prince who is near the end of his career anyway. Good move.
13. Drafted Terry Rozier, RJ Hunter, Jordan Mickey, and Marcus Thornton
Reason: Ainge saw each guy as BPA, and it's too early to question him on that. I wasn't the biggest fan of Rozier at the time, but I'm willing to give him a chance. Hunter and Mickey look like steals. Good move AInge.
14. Signed Jae Crowder to a 7 million dollar per year deal.
Reason: He's a really good role player, and will look like a great deal next year with the higher salary cap. Just take a look at what Aminu got - I'd rather have Crowder. Good move/
15. Signed Amir Johnson to a 2-year deal with the second year non-guaranteed.
Reason: The advanced metrics really like Amir, and when healthy, he's a really good player. Ainge got him at a low-risk deal, essentially adding another asset. Good move.
16. Traded Gerald Wallace for David Lee
Reason: Would you rather have Wallace (bench scrub, basically dead salary) for 10 million or Lee (2 years ago was a really really good player) for 15 million. I'd definitely prefer Lee, and seems like Ainge would too. Another good move.
17. Traded a 2nd round pick for Perry Jones and two 2nd round picks.
Don't even need to say anything on this one. Even if Jones doesn't work, we still got a free 2nd round pick. Good move.
What I'm trying to say is that literally every single noteworthy move Ainge has made since the rebuild began has been a good one, and increased our assets. If we continue on this path, we're in a great position to attract a great player through free agency, and/or trade for one with our mountain of assets. Breaking each deal down, you can clearly see Ainge has done a great job, and I trust him in this rebuild/reload/whatever you want to call it.