How is Larian going to handle players from constantly reloading the game on failed checks or saving the game right before doing one.
That's, generally, why I prefer flat skill checks, rather then dice rolls in cRPGs.
I think that when playing Coop, players will generally less willing to reload to get the "perfect outcome". This might not apply to everyone, but generally if I play with someone I tend to be less of a perfectionist. Another way, is to not make succesfull and negative skills checks simply a good and bad outcome. It negative outcome is in some way unique or satisfying I think there is a good chance players will stick with it. Disco Elysium had a system when players would fail checks regularly, but they were so entertaining most of the time, I didn't feel disappointed that I failed the check.