I like this trade for both teams.
Instead of losing him in FA last off-season, they resigned him and traded him for value. Harris is a good swing forward and a pretty good fit next to Gallo (if healthy) and Jordan. The Clippers also get a first and a rental of Bradley (probably can't resign him?).
The Pistons get splashy and sell high on Harris and Bradley. Griffin may have lost some explosiveness, but he is still an elite scorer and passer at the forward position. I know they like Jackson, but they probably need a better guard, but they got to keep Johnson and Kennard, who could be pretty good 4th and 5th bananas.
Pistons got scarier today. They have a scary future salary cap problem, but they got scarier today.