I can vouch for Fedora, I used plenty of distros from Arch to Ubuntu (and many of it’s forks) and even weird outliers like Solus and Fedora is the most boring distro out of all of them, and I mean that in the best way. To quote a certain Todd: “It just works!” Do note you will probably want to enable RPM fusion (basically mandatory if you use nVidia) to get access to useful non open source and license encumbered packages Fedora can’t ship by default (like media codecs). Other than that, install Steam and whatever other launchers you want and enjoy a boring, reliable distro.

That addendum is there purely so Bethesda doesn’t sue their asses to oblivion (heh). I am certain it will be very possible to play the mod on a pirated copy but it’s not like they can just write that on their website.

According to their website:

In order to play Skyblivion you will need to own a legitimate copy of Oblivion GOTY Deluxe (ALL DLC) and Skyrim: Special Edition. Our installer will not install the mod unless it can find a non-cracked copy of the original games.

and

Skyblivion will work the same as most other complete overhaul mods. Simply install the mod via the installer and press play.

So you’ll probably need a pure unmodded version of Skyrim for it to install onto, but we won’t know for sure until the actual release date.