What Murdr said.
One of the guys from HTC had replied in another thread a few years back, but I can't find it at the moment. IIRC, the response was that AH was primarily about aerial combat, and would continue to be so, with additional vehicles and planes of all sorts added to give some depth to gameplay as a whole.
That's not the verbatim quote, but that seemed to be the basic premise. However, I would absolutely not use the word Simulation to describe any aspect of the game. With huge gaps in the planesets, substitutions in the AvA and SEA, and all sorts of compromises in the interests of gameplay, the word simulation just doesn't apply to this game, IMO.
It's almost 1, but not quite. To be all encompassing, there would have to be actual infantry, not 10 bipedal bombs for the maproom, so I'd say 2 can't possibly be right.