MAVS NEWS:

[rocky164]

There's no chance in hell all of Gafford, Lively, and PJ are back next year IMO.

I know AD wants to play the 4 and maybe you keep one of the centers so he can start at the 4.  But he's gotta play 5 for at least half the game.  PJ isn't a 3 either.

Trading Gafford makes a lot of sense.  You’re right PJ is not a 3, but he could start there with Lively and AD and be one of the first players subbed out.  Then move him to the 4 when either Lively or AD comes out.  Keeping all 3 is a pretty solid playoff front line rotation if you can keep Lively and AD healthy.
Guards are an entirely different problem.  BW in my opinion has proved himself worthy of at least being in the rotation.  Exum can play point relatively well but can’t stay healthy.  Klay and Naji are better playing 3.  
We need both a point and a play-making 2 guard at least until Kyrie comes back.  
I like trading Powell+Hardy for Lonzo.  You may not gain anything but you lost anything either.
So that leaves finding a play-making scoring 2 guard in either the draft or a Gafford trade.