This this very day i have a deep hatred for blizzard because they removed the black protodrake, i hate how they remove things before people even knew the game existed, while other mounts, that you get in the same way are not removed, the arbitrary removal rly get on my nerves.
They could just make a Time walking event to also let you do the old raid achievements, like the wTLK , you could make a raid group and attempt to do the achievements, if you don't do all these week, wait for the wtLK TW again