Also another scenario I am sure that we could play with that could make Sunset sink into worry and nearly destroy herself over it is the fact of how Wallflower was planning on erasing everyone's memories of her being even remotely good.. Even more so when she had her memory reset to before leaving Equestria, That could be interesting to mess with given how doing the attempt would reasonably put one into questioning things and then when her mind would get reset for abit oh the things we could toy with there given how we could have Sun Streak and Onyx have to help her till she gets her memories back and even after as things get settled in her head again
Also I think it could be adorable for the Parents of Sunsets human counterpart to if they come to Equestria they see how Sunset acts over remembering she has easy access to her magic you know like in this clip
https://www.youtube.com/watch?v=syqopYWpODA
Anyway how you doing my friend?