I assume compiling Mesa is rather difficult to set up? For reference I’ve not bothered to try and compile Lutris or Wine.
With AUR it’s as easy as installing any other package, actually.
You just install the git version from AUR.
Installing Arch appears to be more complex than Mint’s Click Yes x4 GUI. Should I expect almost everything to just work after install?
Not even close, if you actually install barebones arch, then barebones arch is exactly that, barebones. You wont even have a DE.
Endeavour is what you want. It’s just straight up arch, but with all the stuff you’d want to set up anyway done for you.
And if you want an “app-store” style app to browse packages with, and not fiddle with the command line to manage packages, install pamac. It can be expanded with AUR and flatpak support.