@ Trigeminal: If I understand Warlok's idea, it would be a bit like Darwinia in that the orders you give to your creeps would become available only as you level. Skill tree would include creep commands like "attack," "move," and "guard" and would cost mana.
The idea is pretty novel, but I'm not sure it applies in this setting. Maybe if you were looking at controlling all nearby allied creeps, not just the uniques you command normally, or if all demis started as assassins and could level into generals. As it currently stands, however, generals are defined by their ability to buff and create unique creeps. Making creep commands level and mana-dependent will only frustrate the player, although I guess we'll have to see what the devs have come up with in Beta 2 for hybridizing the classes.