That's right, Clippers shoulder him and gave him huge contracts but until know he's not bringing anything for the franchise as he keeps resting because of his injury.
They can't force him as there's doctors recommendations and if he needs to rest then he should be resting, like you mentioned he's level of being a star is fading and it's the name that gives clippers some revenue those who still buying his collectibles but NBA wise as a franchise player there's no conversions after he's being acquired.
The Clippers have no identity anymore, that's also a problem. If you build around a boring personality like Kawhi and then he doesn't even play it's hard to form anything.
In the past the Clips had some sort of identity, even when they were the "never win Clippers". After that is was "lob city", which was the definitely the high point of the franchise with player like CP3, Blake Griffin and DeAndre Jordan. But now, who actually cares about the Clippers anymore, nobody. They got a shiny new arena, live in a shiny city but there is nothing interesting about them now!
Well the identity of the city of Los Angeles still belongs to the Lakers. And as much as the Ballmer wanted to change that during the lob city, they can't as they can't win any NBA ring with the prime CP3 and Blake and Jordan, it's like there are still missing pieces. And they try to rebuild, Ballmer throwing a lot of money that time to acquire Kahwi. Unfortunately, it was a different version of Leonard already, as he was not the same anymore.
So even if they got that shiny new arena, and new players, if they are not going to win any, the city will be with the Lakers. They have Lebron, they won a ring in the bubble and they still have the banners along with the championship and retire great players. Clippers can't take that away, and now they've lost Paul George.