the only thing i have a problem with (so far) is that you can alway select a unit by clicking on them, selecting multiple units of the same type (pleas dont make it where it selects all the untis on screan, thats annoying when i want to flank a group with my snipers or warthogs), attack a unit by pressing the attack button on them, but there has never been a way to tell units to attack certain unit types only.  what im trying to say is that i think you should have it so that if you double press the attack button it will tell that unit to attack only those types of units (until they are all dead) instead of waiting for them to kill the units i want and then telling them to attack another unit of the same type (rinse and repeat...).  if i have a bunch of hornets i want to kill the anti air units in a battle an then et the rest of my ground army to retreat while they finish them off so i dont loose a bunch of ground units but thats hard when all my ground forces who are the ones effective against the AA's keep attacking everything im using my air units for.  that has been the thing i think every great game has been missing...