I'm inclined to agree, except maybe it's main armament could somehow be changed. If dropships become limited, it would be utter rapture to give this thing quad 14mm cannons and make it a pure air defense vehicle.
The only problem is that I'm not sure how effective the 14mm would be against a lot of those extreme angles on the dropships.
Getting rid of the thing's being excessive. It elminates the old "mortar next to the galaxy" camping, which I admit being guilty of sometimes, but those that complain about it need to realize that the hermes will blast the galaxy automatically, crush all offensive capabilities of the mortar, and close in for the kill.
Granted, it could pry be given a 75% of destroying any imbound ATGM or mortar with the AAD, instead of it's current level of perfection.