I really didn't know the ai could do non-Mane 6 characters! You're kind of blowing my mind right now, Evergreen! How did you manage to do this? It looks awesome!
I will say her design is a bit more horse like and less MLP then I prefer.
You have to word it just right and be detailed without overwhelming the ai. You can easily confuse it if you are too wordy. Sometimes it will omit things because it is already trying to handle too many things at once. Some ai's are better trained then others for specific characters as well. That is why some people specifically train ai's to certain disciplines.
I hope that answers your question.
As for the design, I have to agree with you.