I can see them essentially making those "unofficial official" servers where you can take your character to play with friends and then go back to the "main" servers etc.
Would actually be kinda neat, especially if you can play with various groups of friends on various servers in your own little "private" servers.
At this point, given their moves with the paid mods in FO4 and shit I'd be more surprised if they legit opened it up and let folks host their own servers that they could tweak and allow them to more deeply mod the game.