Y each team accepts the deal:
Pistons: As a Pistons fan, I believe this is a fair trade in terms of giving up something to get something, cuz their main weakness is not having a legit stretch big or second option for Cade. So getting KP fixes that and they get a first rounder in this year's draft since they didn't already have one. Then, Pistons just gotta resign their guys and they'll be back in contention.
Bucks: It's a sad time for Bucks fans, as I think we all have the feeling that Giannis is going to want out of Milwaukee cuz they don't have the assets to make a big time move in the offseason. This way, they get hella young talent alongside Dame and three firsts which is a best case scenario for them rn.
Celtics: It's tough for the Celtics because this team is so good and well put together, but they'll owe so much money to different guys that they can't keep everybody. I mean, the Celtics already have two stars in the Jays, and Derrick White is honestly their 3rd best player, so there isn't much of a need for KP and Pritchard. In this scenario, they get cheaper and solid players that make up for these two(even though they are downgrades), but Bobby Portis has championship experience plus they get two firsts, and they resign Al Horford to a cheaper deal on top of it.(Also, I promise you Sasser is a bucket getting point guard, but there's not much need for him now with Schroder)
Thunder: Everybody rn is saying the Rockets, Spurs, and Knicks(and Lakers but there's no chance) are the teams that have the highest and most realistic odds of landing Giannis. Then there's the Thunder, with all the draft capital and young talent in the world that could be enough to get him. However, they were the best regular season team since the 2016 Warriors, so if they don't win the championship, they need to go out and make a splash, and Giannis would b perfect next to SGA and J-Dub. Plus, Stewart would make up for Hartenstein's physicality and he's a capable shooter. But again, if they win the championship, they run it back and don't bother making a move like this.