Nice to have a clam down season premiere for once. So this a epilogue to last season's finale I like that.
Again Discord he just loves messing with Twilight, sometimes if it is because deep down he cares like an annoying sibling, or is he just a jerk, maybe both, It is great to see another side of Celestia and more importantly for Twilight to see that side of her, which much needed. As soon as we saw the flashback of young Twilight and how she differs from present day Starlight, I knew where this was going. Also seeing in the moon in the flashback, that was a nice touch.
So Starlight is no longer Twilight student, they are just roommates, I wonder by season end will Starlight get her place. So Starlight stays, and an emotional end, that is a good way to start the season