Sandbar vs kirin

I understand that sandbar is part of the student six because he is just another creature in the world, but ponies already have so many main characters in the show! What would be cooler in my opinion is to have a kirin be the final member of the student six. I know that the kirin are introduced in season 8 after the school opens and the six are introduced, but we could just switch that episode with the other flutterjack map episode. This would make more sense in the hearths warming eve episode where they have to stay and clean the school because of gallas, but it’s confusing why sandbar is still there. He lives in ponyville and shouldn’t have to pack, just had to head home, idk why he has a dorm. It would be so awesome to give SIX non-pony species a chance in the spotlight!