I highly doubt it has anything to do with DOS II.
4 is a very common party size, especially for Games which support Multiplayer and even more on Console.
That you can not have any utility in the group is exactly the point i think.
You have to make choices and this also adds more replayability to the game.
To me it doesnt matter if ots a 3, 4 oder 6 Party, but blaming DOS again is just random., i think there are good reasons for a 4- party
Its certainly DOS 2's fault.
It is obvious that Larian is taking DOS 2 and do small modifications to the game to make it look more like D&D. So the reason why we have such a small party is because DOS 2 had a small party and Larian did chose not to change it.
Why? I guess because of the origin system. As all NPCs are playable origin characters who all require voiceovers, etc. a larger party means they have to create even more origin characters which takes a lot of money.
