The worst case scenario is if they've 'learned their lesson'.
One thing that I like about EqG over FIM (which I can't stand) is
Sunset Shimmer exists! the way that they brought Sunset's character round full circle from bully to trying to reform (and being doubted), to being reformed and the heroine, to being the mentor for SciTwi, to being basically the leader...and I liked that there was the recent special that dug into that and tried to erase it so she had to challenge herself again. And I like that her power is essentially 'empathy', which is something she lacked at the start but gradually has learned.
I think she is such a much better "Friendship project" than Twilight in Equestria because of that. I also like SciTwi better because of similar reasons - she's gone through the loop as well and evolved as a character.
The plot is fairly irrelevant as you know it will basically end with a fight v a super villain with equestria magic and some ponyupping with them advertising some outfit probably on sale with a doll or a mini at some point (maybe not now if the line is ending).
But I like the Dazzlings as they were. I want them to stay like that.
I think how they've handled Trixie - esp in the Sunset friendship one - works well. Not quite a friend, but sometimes an ally - they could bridge that middle ground if they're fighting a common enemy, but I don't want them hugging and making up at the end with the Dazzlings.
I really hated that moment in the FIM movie when
Spoiler
Tempest Shadow suddenly decided she and Twi were best friends. I can see her learning from her mistakes, but yeah. Twilight is not well depicted in that movie in a lot of moments, and I don't like her being rewarded for it by the best character in the film suddenly becoming her buddy.