You say you get it but you don't.
Luke Skywalker has always been played by Mark Hammill. No matter who writes him, he's always some form of Mark Hammill. Solo? Not Harrison Ford anymore, but definitely an attempt to stay in the same vein.
Once more with feeling, Thundercats is a long, loooooonnng walk from Star Wars. Let's instead go for something a little more on point, like Sea Quest. Roy Scheider is dead, after all, so we're going to need to re-cast. Shall we go with Zach Galifianakis? Or maybe Jonah Hill? No matter how you feel about Sea Quest, you can acknowledge that it's going to be a different show. And it's not going to be liked by Sea Quest fans, the ostensible reason for the reboot's existence. No, it's going to be liked by Jonah Hill fans.
That you insist this is about race or some shit just shows how badly you want there to be no reason behind it.