I like having a Hellfire that can kill me, and be used in any spec.
I like having complicated talent trees that I can fiddle with.
I like having to play lots and lots just to get to 60.
I like the fact that you have to walk a lot and that getting that mount at 40 tastes so sweet.
I like having classes that are actually different from one another.
I like having more than 2 spells.
I like doing challenging raids with 39 other people at 60.
Read the idea of a pristine server carefully - they said nothing about a cap at 60, or progression server, or whatever. It's just WoD or Legion but with a few compile options toggled that will make levelling less absurdly fast and add a little requirement for community to exist.. Once everyone gets to 100/110, it will just be the same.
A Pristine WoD/Legion server is still WoD/Legion. And I personally don't like that version of the game.