Deemix-gui + Deezer subscription or SoulSeek/Nicotine+

I’m just going to go ahead and say this now, do not expect most windows games to run better on Linux than windows. Typically the case is when you find a well optimized game that is CPU bound, or is natively vulkan. Anything else, expect comparable framerates.

I agree with every point you make except for the desktop environment front end.

While it is nice to install a distro with a given desktop environment OOTB, you can always change it, and even have multiple ones installed at the same time. This is typically a better approach to testing out desktop environments because you don’t have to reinstall every time.