It's good but as a fan of survival games like Minecraft, Rust, Valheim and Grounded it leaves a lot to be desired in that aspect of the game. It feels really early access (which yeah I guess it is so I'll concede on that) and feature non-complete. With that being said, I'm still coming back to it and enjoying it.
P.S. I'm also on gamepass and have sunk a few hours into cloud gaming as well and it's pretty good. As soon as Microsoft start adding something like native upscaling to xbox cloud gaming they're gonna be on a whole other level of playability.
If it ends up being Optimus, I've found optimus-manager-qt from the aur to be great. You don't have to mess around with configs and you can make switching or setting to Nvidia permanently really easy with it
I didn't want to enjoy this but it's somehow so relaxing