I believe that I covered this but will try and clear up this idea that the airspawn could be used to gain unreasonable altitude advantage near otherwise normal gameplay.
First of all, the idea was to spawn to an uncapturable area outside of the normal gameplay at a "reasonable" altitude (enough area to move/ dive away from immediate attacks), but no higher than lifting from a medium altitude base.
Basically, a DA "furball lake," map corner or "crater" would have to be configured -- so for that reason alone, most likely the idea fails because it would be too difficult to rearrange every MA map.
The additional cost of perks, was an after thought, making the choice to fly there an informed decision (preferably with pop up warning screen to accept the choice). You see, I have made many button fumbles in my recent years
and mistakenly spawned in a totally
different area than expected.