Just my thoughts…
Since there is still time. I really hope that the creators of the new expansion will change their thoughts on having a new race. Dragons are supposed to be large and grand; making them small is just silly (to me).
Rather (and this is just an idea) just make all current races be able to become Evoker’s. If they choose to help out the dragons then they will get additions to their character…aka; give them a dragon tail and wings. This way all heroes of wow can be their favorite race and still be able to transmog gear. This will also allow everything the creators have already put into the game to still work. The class can still fly and can still do all the abilities, because the race will be imbued by the dragon essences.
Just my thoughts…really hope they read this and others also agree.