I think with UAVs, you don't need a very large hangar, heck a garage would sound about right. So I think it's possible to do that on the 056. The larger heli pad would permit manned helicopters to land if needed.
Since the presumed service area of the 056 is the first island chain, I fail to see why the heavy expectations of its ASW capabilities. You can easily have anti-sub planes work in conjunction.
I don't see this ship replicating the other agencies. What ship in their respective fleets have similar armament to the 056?