These are some neat suggestions! We definitely need more horn types; at least one more for me specifically with what I've been doing. I have been making original Dragon characters with a set of 8 Elements, but since there are only 7 horn types in this game, I had to reuse and rotate the horns I used for the Fire Dragon instead of giving the Lightning Dragon a unique horn type (sorry, Voltage!). I hadn't been able to think of other horn types to suggest, but your idea of Kudu styled horns sounds like a great idea to me. :)
(I heavily second the undo button and the wing slider thingy too)