I like your ratio. Honestly I'd like to see what her tail would look like on her too. In my opinion, your ratio is how humanized ponies SHOULD work.

Seems funny seeing they're characters from "My Little Pony" yet they lack pony features/body parts, but yet they aren't anthro either, so it makes sense that if they're "humanized," they are humans with pony ears & tails, plus horns and/or wings, depending on if they are pegasi, unicorns, or alicorns. That's all I have to say about it.

Thank you! I spent a good while trying to decide how much human to pony there should be, and I do like this although I've since decided I like them to have at least hooves for feet, especially because I think it balances out the tail.

Man I really gotta finish this picture though @_@