See: WoW forums.

Blizz Devs post fixes to actual broken mechanics, classes, UI etc and adds in long awaited and requested vanity changes.

All april fools.

It's more a: This is a real problem, so we fixed it for balance. LOL NUH WE DUN, play our borked game.

SE would have trolled better: 'We now allow 5 (or 6) man light parties. All DF require Tank, Heal, DPS, DPS/Support, DPS, DPS. '