I will allow it on the concession of it only being used as a diving attack. I've made my opinion on constantly flying rather clear by now I believe. For my part I have no plans for enemies to have that as well. Flying in general is a very overlooked ability in a fight where combatants typically have no counters when its in say an open plane of land and not in the vicinity of large sky scrapers. Its the reason archers are so threatening since at certain ranges they have impunity from damage.