[laiocfar]

Maybe they are stockpiling to finish you off, the easy battles are to make you feel confident and powerless when they deploy all their firepower :P.

No, never heard of something like that until now. In my superhuman game, i blowed near the half of alien city and still found they armed to teeth. And still have many problems with that Megaspawn that can kill a whole team if caught uncover or ambushed.

Another point against flying low to avoid damage, is that the destruction to the city will result in the economically collapse of Goverment so no more Senate fund and you will have to survived from seized weaponary (forget of use heavy weapons in general and ambush or semidefensive tactics) or from selfmanufactured weaponary (each veteran trooper killed will result in the lost of a very valuable amor).