The Hornets do this to form their frontcourt of the future. I think that two athletic young guys like Collins and Bagley would dominate next to Lamelo.

The Hawks do this to get value out of Collins who declined an extension with them because he is looking for more money. In return they get a Young do it all PF who is great from 3(P.J Washington). They also get 2 1st round picks and a 2nd.

The Kings get Kevin Love who they have shown interest in this year.

The Cavs do this to move on from Kevin Love's huge contract. In return they get a young foward with tons of potential which they can pair with Jarret Qllen in the frontcourt. They also get 2 2nd round picks. They also get expiring contracts.