See, just another one of those instances where there's just SO MUCH they could do with the princesses in terms of good episodes and character depth.

"Wow, my big sis moved the sun and the moon by herself for the last thousand years while I was… away. Boy… don't I feel useless…"

Come on writers! You literally have a silver-platter of good ideas just sitting here!!! Hell, they could start selling Princess Luna and Celestia toys by the truck-load if they actually FOCUSED on them, they wouldn't have to pull new princesses out of the damn ether…

"But what about the comic where-"

No, fuck you, didn't happen. shoos away