I've said it before and I will say it again: This game does not know any 'high tier' villagers. That's a label that the community pushes onto certain ones, the game itself treats them all as equal. There is no list in the code that says "Hey, this one villager is worth more than others" and having one would never work because this is purely a subjective thing. ;D
At best, they could add islands that are bound to a species... Being able to tell the game "I want to go to a gorilla island" would certainly help people look for their favourites.
fair. A ticket to different islands with a different experience would be nice. The mayday event was nice while it lasted.