Aion's combat is fast paced and movement / positioning are very key. How you move effects your stats in positive and negative ways. In addition to this you will possess skills that will throw your enemy in all directions.
This will certainly give an advantage to skilled players that can deftly maneuver their character, and the clumsier ones will end up harming their own stats. At the same time, aerial combat combined with knockbacks or throws sounds pretty disorienting, and it could get tiresome chasing bouncing targets (or worse, being that bouncing target) through the air. We'll have to see how it all pans out. Check out the full interview for the flight details, as well as some discussion on Aion's system specs and archetypes.