I couldn't even imagine this game without auto-ack. Even with it we have far to much vulching. Could you imagine having only manned ack and how single players would roll in NOE and shoot up all the ack before other players bothered jumping into them? Then you would have one guy spinning around the field, below 500', just camping the runways.
Its really easy enough to de'ack a field as it is. But it does take time and some teamwork. Without the auto-ack, and forget the vulching for a minute, it would be so easy for one Jabo to pork even a large base. Ords, troops, fuel...forgettaboutit.