land unit launch into air should be able to aim by anti air tower

in common sense when land unit were send into air ,
while they are still in the air ,
anti air should be able to hit them when altitude becoming lower.
and then when they are low enough other tower that in range should be able to hit them as well.
rather than wait for them to land and start shooting when landed.

vertical range should be implement to all tower.

I recommend checking the replies in this thread, specifically from GF: http://zero-k.info/Forum/Thread/35140

In general I think it's weird that AA can't shoot space-jacks or flying snitches, but neither are game-breaking.
Flying snitches is generally just a waste of metal. First few Space-jacks are more dangerous if team is unprepared.