TrailBlazers: With Portland drafting Clingan and also having Ayton on their team they have too many centres that they don't need, so in this trade they are sending out Robert Williams III who although is young has struggled with injuries will be moved on from. For Robert Williams III, Portland will get Boucher who is on the last year of his deal and can have his salary dumped creating more cap space for the Blazers, but also supply bench production for this upcoming season. They get a FRP on top of that from the Warriors which is top 8 protected and should have some value for next years draft.
Raptors: Toronto sends out Poeltl and Boucher bringing in some more bench depth and youth in their team. The main stand out of this trade for the Raptors is Robert Williams III who is still young but has just struggled with some injury issues. We have seen though how talented he really is at his time with the Celtics and if the Raptors are able to unlock that they have a nice addition to this core around Scottie Barnes. They get some contracts dumped on them in Looney and Payton II who can bring some great production of the bench and be used as trade pieces or to create more salary room.
GSW: Lastly we have the Warriors finally getting a centre in Jakob Poeltl. The Warriors need for a Centre is huge if they are looking to continue to contend with Curry going forward. He brings rim protection and great movement in pick and roll situations which the Warriors thrive in. All they are giving up is Looney who they were willing to release and Payton II who although is a nice piece on this team, he is worth giving up for a starting centre. They also give up their FRP for next year as they look to make some noise in the Western Conference.