In terms of Kawhi's "Load management", I think part of it is to guarantee himself of a large contract. I think once he gets that max deal I think it is possible he may play more.
I think the Raptors are about 50/50 to keep him. I think he is finally comfortable here, and I think it takes time for Kawhi to get comfy around people. That is an advantage. Winning is so-so, if he can hang around the Raps should have cap room to add Kawhi / Siakam in the offseason before the 2020/2021 season..
But the Clippers are a very attractive offer as well. Some solid young pieces and obviously home.
I don't think he will go anywhere else.
And BTW, this is the best playoff series I have ever seen, for a player on a team that I am a fan of..