I'll go ahead and add my +1 here.

I've always felt that 6 party members was the ideal DnD party in CRPGs... but if the devs feel like 6 is too many, I would be satisfied with 5.

Even having just 1 more party member would make a huge difference and would give a lot more freedom to players to play as they want rather than be forced to fill a certain roll in the party.