I Have seen this conversation once before (well, in the arena tho), but my opinion back then was that it is not bug or cheating, if there are still 2 barrack buildings up (could destroy those easily, even with guns, so far)
Let me explain why I don't think its wrong:
Lets take an example of base, which has to be captured.
It has barracks buildings and other still up, just air defences are destroyed and paratroopers are ordered to capture them.
Paratroopers are being dropped nearby the base area, guards spots them and calls alarm, people runs out of barracks and elsewhere to defending positions, byebye paratroopers, or at least delay with casualties.
Another example, with same situation but barracks and such buildings which supports soldiers etc. are destroyed.
Paratroopers are being dropped nearby base area and guards spots them,calls out alarm, but only a handful of soldiers comes out for defend, because of men loss, supplies loss and connections.
So on paratroopers with better chances and supplies comes and takesover the base.
No flaming please, just my opinion, not my abuse