162) when terran vehicles die, they blow up and kill others next to them
163) buildings can land on enemy units instead of just saying "cant land there"...utterly squishing them
164)there should be a zerg unit that can travel underground and attack underground (perhaps and upgrade for the lurker?)
165) missle turrets to like...attack the ground...or an upgrade allowing turrets to be stacked on bunkers..
166) zerg need a heavy air unit (not couting guard), that can attack both ground and air, terran have battlecruiser, protoss have carrier.