At this point, the entire NBA is in a waiting game mode.
You're waiting for 2 things:
1) The west is waiting for the Warriors to become weaker.
2) The East is waiting for Lebron to retire.
So, if I'm a GM, I'm handling things like Danny Ainge. I'm not necessarily swinging for the fences trying to lure in huge superstars to win huge right now, because the road goes through Cleveland and Golden State, and nobody is going to beat both of them.
So, I'm building things like the Timberwolves and Celtics. Young guys with talent, surrounded by a veteran core for maturity. That young core will grow up, and it will become something special. And by that time, Bron will be on the downhill (whatever that looks like), and the Warriors won't be able to afford this pace forever.
But right now, everyone is playing catch-up. That's all.