Humanized pegasi are angels. I think it's better because it keeps the characters as they are in the show. Your idea would only mean places like cloudsdale wouldn't exist otherwise. still, it's your choice so I'll just deal with it.

Make cloudsdale a sports village like in the olympics. If you want a character to be humanised, they should look human. having wings is not human

well that's your opinion but I think the angel wings and demon horns at to the characters racial abilities in the canon show.

then what re humanized unicorns?
demons?

yes. At least to me they are anyway. But they are good demons unlike the ones you get in hell and stuff and can produce magic using the mind.