Well as much as I'd like to bring chaos to helpless little peasants on the ground...
*spontaneus evil laughter*
...The game would become too easy and there would be less need to use our human form.
Well games like Drakan proove there is a possbility not to make it too easy. With effective anti-air-weapons for ground units, like catapults for example, combined with powerful air units. But yes Drakan is also an Action game i give you that...