This is honestly my biggest concern about the whole idea

Wasn’t she alredy…

A- Special student of the ruler of equestria
B- Probably the best magic user unicorn there is

Also, you’re rather missing a important fact that is not caring about the person’s characteristics, if you’re friends with then. Cadance was a alicorn but twilight was her friend and the fact she was one didn’t really bother her much…

Let’s see how this will turn out first before we start judging on it really. Hell she might not even turn into a alicorn at all, or ask for it to be reversed.