Well, there is such a thing as a dreadful beauty. Maybe beauty is simply magnitude, whether it be positive or negative.
Yes, there is such a thing as too beautiful. For instance, with actresses and actors, after they have like a billion surgeries, they start looking too beautiful/handsome and feel unrealistic to our eyes. Then, we consider them no longer beautiful but simply alien.
Also, side note: Why do I feel that in a couple years, the thoughts expressed in this thread will be written into a book?
EDIT: Beauty is not the evoking of feeling, but a feeling in itself apart from all the others.