there was a thread recently i read about how gnome devs broke icons in KDE apps running in Gnome and when it was brought to their attention they're like this is not our problem
Sorry what? Are you asking what filesystem to use for Windows gaming on Windows, or an FS to use for windows and bazzite to share games access (in Steam?)
I mean if you're ONLY going to have Windows, NTFS. If you want to use the same games drive for Windows and Bazzite, BTRFS, and get the BTRFS driver for Windows.