The party of 6 just feels right when adventuring. additionally i have a suggestion that comes from experience on Stellaris of all things: Give us the option to create characters that can be forced into the world (in a selection of early random spots maybe). Maybe you could create a collection of different characters that you like and have a randomised spawn for an extra bit of spice in re-playability. Perhaps a limit of two extra player created characters would be enough to still allow plenty of origin stories to be enjoyed along the way. It would mean very little in extra commitment from the devs on dialogue and origin backstories, while also allowing us to put together the group we imagine might be interesting to use. I'm a warlock lover, so i need as many character slots as possible to get my lock in play without feeling like i am missing out on the basics of good group structure.