Gaben is also an FF XIV player, and Proton always gets a hotfix like a day after anything breaks (usually it’s the launcher).
If bans from playing on Linux (or at least the deck) were common there’d be a lot more info about it like there is for other games. Just don’t cheat or use sketchy mods. I’ve only played on Linux (all AMD tbf, both desktop and steam deck, so the drivers are good) and have never had a problem.
Stop caring about native. It seriously just doesn’t matter anymore.
XIV Launcher is the easiest way to get FF XIV running, plus it can link to your phone to almost automatically handle OTP (no typing it in, your phone just sends the code over your local network), but you could also just install the trial inside Steam, should work fine.
Copypasta time. “Did you know that the critically acclaimed MMORPG Final Fantasy XIV has a free trial, and includes the entirety of A Realm Reborn AND the award-winning Heavensward and Stormblood expansions up to level 70 with no restrictions on playtime? Sign up, and enjoy Eorzea today!”
Winbtrfs has some really funky bugs (some apps like Aseprite will somehow make files which get padded up to a round KiB size on disk which breaks some file formats, even though it doesn’t do that on NTFS or FAT), is way slower on Windows (longer loading times, streaming asset delay, delayed audio on some situations like RPG dialogue, Skyrim mods are especially problematic, blah blah blah), the extra permissions make managing it annoying, and symlimks generally just don’t work on both Linux and Windows at the same time no matter the FS which can occasionally be annoying. I really wouldn’t bother with winbtrfs for games unfortunately
That’s what a schematic and DRC checking tool are for