For half year we are beging larian for allowing us to have 6 member party ... So far with litteraly no result.
I applaud your courage when you think this will work out for you. But I wouldn't believe it much.
But it would be a really interesting mode.
Larian aren't going to introduce every little idea that would be interesting so this is very unlikely to happen. But it's infinitely more likely than a six person party. A six person party is completely unrealistic and can't possibly happen, even if every single early access player demanded it every day until the game was released. You might just as well beg Larian to turn it into a first person Looter Shooter.
