The trade would be Zach x Gafford and Fontecchio x Dinwiddie, that would give you more spacing and better perimeter defense, Maxi is injured all the time and Wendell Moore would be salary filler.
The 2 seconds would help a lot in the future.
Mavericks
+3 players ($16.7m) +2 picks,Cap Impact + $488K
-4 Wins
-24.31 MPG
-0.13 Off.
-3.02 Def.
Pistons
+2 players ($11.0m) +3 picks,Cap Impact + $770K
+1 Wins
+22.64 MPG
-0.65 Off.
+1.07 Def.