To add some details: at the beginning of BC, Blizzard added sets for Blood Elf Paladins and Draenei Shaman (for those who don't know, prior to BC Shaman were horde exclusive and Paladins to the Alliance - Blood Elves and Draemei changed that) and those sets also can't be used to mpg, even though it's literally impossible for a Horde Paladin or Alliance Shaman to have attained a PVP title, so the awesome Blood Guard set is completely off limits forever.

The vast, vast majority of the playerbase joined after Vanilla. I played during Vanilla, but I've switched servers and factions since then. How many Grand Masters were there? Like a dozen per Vanilla server, tops? How many of them still play? How many that do are still playing the same character on the same server? They're rewarding less than a hundred people at the expense of millions. What an asinine business decision.

But all of hat is tangential. The point of transmogrification is to allow players to customize their looks and experience the awesome old artwork again. All of these arbitrary restrictions show that some part of he WoW dev team is still mentally in the Everquest poopsocking mentality, and that's unfortunate for them and their customers.