I rewatched the episode last night (albeit at twice speed) for my MLW summary writeup so I'll give my more solidified thoughts on the episode:
-The whole clip where the students all try to do their own thing and Yona just watches them squabble was so unnecessary. We knew that Yona would be right in the end, we didn't need to watch it happen.
-I really hope that the school still being in the summer means less school-focused episodes! Or even better, no school episodes!
-Even though I transcribed the song, I still can't separate it from the one in the season 8 opener. I keep going from "we celebrate the tree...IN HOOF IN HAND IN WING". The song has no identity of its own at this point, it's half baked standard Ingram rushed trash.
-I still really liked the clips of the students in their hometown. I wasn't a fan of the Yaks at first but now I want a whole episode of Yona in her hometown.
-Sandbar is the least compelling member for sure now. I hope they flesh him out a bit but right now he's just there.
-The treehouse's design is MILES better than twilight's castle. The castle always looked weird at first, this one got me right away.