Auto rudder is for people that don't have paddles, to ease up on take off, as twist sticks may not be precise enough to deal with engine toque appropriately, what could make the aircraft unusable for some customers.
It does not add a control feature that the plane did not have, unlike an auto trim features, which is something you may find in more modern aircraft.
Auto trim would also make it easier to aim than it actually was. I don't think that this aircraft should have some kind of advantage, that it simply didn't have for the sake of user-friendliness.
I16 pilots were completely exhausted after patrols, as staying in formation without trim required them to constantly apply force to the stick. It was a serious drawback of the aircraft.