If Donovan Mitchell decides against signing an extension, then moving him this season would be the wisest thing. Here, they get a pair of young players plus a boatload of future picks for two older teams that could become very valuable (Note: MIA 2030 pick is a stand-in for their 2031 pick). Chris Paul is just salary filler, he can either be cut as his contract is non-guaranteed, kept to move at the deadline, or just kept to be a bench vet.
The Heat here move off of Jimmy Butler as they decide that a pairing of Mitchell/Bam is a duo they can build around for the future, while Jimmy is rapidly nearing the end of his peak (and there seems to be some level of tension between the FO and Butler). Donovan would be happy in Miami and would almost certainly re-sign there, and him and Bam are right in the middle of their primes ready to compete for a long while together.
The Warriors have a tiny window if any, so here they go all in to try and get one last run with Curry. They would also then probably re-sign Klay, and see if a group of old vets can put it all together at the right time and go for it all. Curry/Klay/Wiggins/Butler/Draymond is a closing lineup that could make some noise.