Nets: Use their salary cap to absorb an expiring contract (has to receive draft compensation to do that).
Lakers: Get a starter-caliber center on a expiring without giving up to much.
Celtics: Free up 30 million in cap space for free.
Hawks: Get an underrated defender to play around Trae for free.
Heat: Get Vincent back for free.
As I said draft compensation would depend a lot on the negotiations I think Heat and Hawks are breakeven but if they are interested on the deal they might send a second round and if not they might receive.
While Celtics would be happy to send KP out for free since his salary is a huge problem for them and might be even willingly to send a second round or two.
Lakers would be happy to get KP as their starting center (if relationship is ok with Luka), and would probably send a second round or something like that (I don’t see them giving up the 2031 FRP on this deal).
Brooklyn would receive the draft capital for absorbing Kleber’s contract, since is an expiring I think it would cost like 2-3 second rounds or something equivalent.