If they nerfed its ability to prevent fleeing in the air, it would be fine. It is supposed to be a nuisance, with little chance of actually killing you. Smaller birds should harry large ones in the air. Happens all the time. But the large birds should be able to fly off quickly.

Try playing agaisnt a hummingbird with Entropy powers. Instant death for anything flying.

Air to Air battles are lame anyhow.