As others have said, things may look very different if you simply make the character follow the rules. Just checking and correcting the feats (prerequisites and number) and making sure the flying rules are followed could work wonders.
If he has Poor maneuverability, he can't hover and can only turn very slowly, meaning that he probably won't be able to attack every round while flying. Also, he has to move every round so will never be able to make full attacks so no fighting with two weapons. (it's in the DMG, look up maneuverability) It really shouldn't be very useful in combat.
I look forward to seeing what the character looks like when you've made it legal.
If he has Poor maneuverability, he can't hover and can only turn very slowly, meaning that he probably won't be able to attack every round while flying. Also, he has to move every round so will never be able to make full attacks so no fighting with two weapons. (it's in the DMG, look up maneuverability) It really shouldn't be very useful in combat.
I look forward to seeing what the character looks like when you've made it legal.