Im probably gonna make Outer Wilds my first game I use to test Gamepass but for now Im gonna wait and let them sort it out a bit more. Looking at the gamepass thread and people are getting random issues and BSODs.
FWIW, I'm playing on DX12 with no crashes. Game fails to register G-Sync sometimes (I'm using a free sync monitor and enabling it through Nvidia control panel) but that's about it.