We still got:
Dragonriding
Profession Update
UI Update
Talent Revamp
As highlight features of the expansion. That’s not even to mention the entire Dragon Isles as a whole which is the biggest continent ever added to the game since launch. It’s not a bad thing to be skeptical of Blizzard after the last two expansions, but Dracthyr Evokers aren’t the only thing this expansion has to offer.
Of course you’ll see thousands of Evokers when the expansion launches, but that’ll even out over time as people go back to their original mains.
And again, Blizz has stated that they aren’t against adding more classes to Dracthyr in the future. The only reason they didn’t was because of “lore” (Which honestly doesn’t sound very believable but oh well).