Limitless is a must in SC2, it wouldn't be too hard to do since you can just use the multiplier like they did in Star Wars: Empire at War, but once again unlinke SupCom Starcraft 2 is aiming to be more about individual tactics and less overall strategy. SC2 is clearly aiming for an operational UI which helps you coordinate individual units instead of giant groups of them, this is obvious since in the unit selection box, each time a unit dies, it leaves a space so you can clearly watch what casualties you are taking in an attack.