I didn't watch it, but I did watch the clip where
Spoiler
Sunset Shimmer reunited with Princess Celestia
which was cute.
I can't really get into EQG because I just can't fathom why someone would want to be a human stuck in high school as opposed to a magical pony. I'm very lukewarm about "High school! Isn't is SO GREAT??" franchises in general. Although I realize I am not in the target demographic for this kind of thing, so fair enough.
Maybe that's why I think Sunset is so boring. She had demonic powers and she chose to be a school bully? And then she chose to just be in school. She's a minor, how does she even manage to live all by herself? Being a demon and terrorizing the human world to achieve world domination vs being an orphan dependant on and obsessed with your friends.
I get that moral lesson had to be in there somewhere but damn, Sunset is a rather sad character. Dead parents, forever 14, some kind of Avatar on Pandora cross-species romance. Lol!