Yea but then you would need more companions. And it looks like Larian isnt going over 8...sadly. So a party of 4 makes sense. At 10 companions party of 5 would be great. etc...
Even for the poor D&D 5e ruleset there are more than 4 classes so why not more than 4 companions? So if we get 8 comp. a party of 5 would be possible. Maybe the problem is the chain char. navigation system of Larian? Change this too