Yep, pausing is cheap. OK, so the AI can process commands in the blink of an eye but on the other hand its an idiot. Even with 16 units to command you have enough time to implement your battle plan and make corrective actions - and if you don't, you've been beaten by a better opponent! Having HA at the other side of the field can be a little distracting as they need a certain amount of micro management but its all possible.