The multiplayer issue would be less of a problem if they just let you pre-create characters or export. But, somehow I feel that there would still be arguments, because that's just how people are.
Oh I love the idea of export, but the initial characters should be created with the same rules and with integrity.
Look, I don't know what Larian plans to do so I have to try to create rules for the Discord in regard to a system that I have NO idea what it will look like. What WILL 100% piss people off is if someone shows up with some uber character that has all 18's or 17's in its stat block. It makes for a boring game and that personality type that would behave that way isn't going to be welcome in most games and most of the people I game with.
Import a character that we have been playing with session to session would be great though - assuming we get additional adventures.
From a power and stats perspective there really isn't anything point buy can't cover if you understand that a 14 is a really powerful stat to have for any ability score.