-I don't like that it has no ground animations
-I don't like that it replaces normal flight form.
-While I don't think it's ugly like many other posters, I prefer the normal bird or the glyphed owl in most cases.
-Losing out on it to be able to use other forms sucks, having to go to the order hall to switch sucks, swapping the glyph in and out really sucks.
If they gave the option to split it into a separate form and fixed the animations, I would absolutely love it. As it stands, I don't.