The bottom line skillset for generals that increases the power of thier monsters should be made to scale signifigantly higher.
Right now its like +50armor, +2% attack speed, ect. At the higher level end this should be like +500hitpoints,+250armor, ect.
General demigods are real good(with the exception of QoT) but monsters/minions just arent good late game. If a general invests heavily in the skill line his monsters should be worthwhile.