I must admit I think this is a change for the worse. I don't see any need to arbitrarily limit missile units to AA only. Same goes for missile bots and tanks. I also think fighters should be able to target ground units (even if they are ineffective) and basically the principal of "if it has a gun and it can see something, it can shoot it" should apply. Rock, Paper, Scissors type rules have RUINED so many otherwise good RTS games. What some people call 'diversity' I think of as stupidity. Take Age of Empires- archers were the counter to knights, pikemen were the counter to archers, whilst knights countered pikemen. Problem was that if you had 100 knights, and I had 2 archers, my 2 archers WOULD WIN?! Which is obviously ludicrous. In TA, fast skirmish tanks were good counters to missile trucks (1 on 1 the missile truck would have no chance). However if you had 100 missile trucks and I had 2 skirmish tanks, the missile trucks would win. Strength in numbers does make sense. I find it irksome that in PA, 2 pounders can kill 100 spinners on the basis that for some reason the spinners have 0 anti ground capability, its crazy. The argument commonly made in support of this is "it makes sure all units are useful" or something along those lines. Ok, get your point, but having units that fulfil multiple roles *doesn't* mean they won't get used. If you watch games with missile towers currently, people DO make laser towers. The missile towers are good for light defence of expansion against small raiding parties. They also ward off small air raids and stop individual scouts having free run. They aren't any use at stopping large amounts of units. In this circumstance players currently pepper their base with missile towers, and protect critical locations and choke points with laser towers. This strikes me as a sensible approach and both units are being used. Stopping missile towers attacking ground only has one effect- it means I have to spend more resources building 2 types of tower instead of 1, rather than doing what I want to do with is make mobile units.