A lot of people have asked repeatedly for 6 man parties. For me this would give the game a more Baldur's Gate feel other than it just being a game by a company I'd never heard of with a bit of D &D from a version that again I hadn't heard of.
There is already the option to get multiplayer to 6 slots on the starter ship. 4 characters and 2 NPC's. There is some clipping in cinematics and items in inventories are a bit small but it's playable.
So why not unlock this for the rest of the game? Unlock 6 slots with 2 of them being NPC slots, or 3 and 3 even. There would be no extra need for more NPC's or dialogue and people like me can build our parties (takes a bit of work creating a 4 man multiplayer team solo and a lot of praying that it doesn't bug out b4 you can make it a solo save) and add NPC's just for the nookie or as meat shields.
Those who want to complain that a 6 man team is blasphemous (or whatever spurious reasons they have) can carry on happily playing with themselves.