Anyone remember when you could run heroics in Burning Crusade, and given some time, get some cool pieces of badge gear? I loved the axe I got, even if it did appear to be a hunter weapon.
Apparently, not working as intended! You might think that at level 70 killing a boss in a BC heroic would give justice points, the replacement for badges. You'd be wrong! Instead, they don't. Thankfully, you can run random dungeons, which wowhead says do give justice points. At level 70 you cannot queue for the normals and are instead limited to the heroics, which supposedly are seven times weekly. There are also the daily dungeon quests for 10 each, bringing the total to 20 points per day. Bosses should give 5 each, but if anyone in the group is above 70, which thanks to the dungeon finder they often are, no points. That means either a very, very slow process of manually forming groups for rarely-run content or a lot of voting to kick people who have done nothing wrong.
The net result is that any gear is absurdly expensive and slow to acquire. At level 70. But hit 85 and run all the randoms you want with bosses dropping the proper points and the tool giving even more, and then go back and buy it all. Because that makes sense. Would it have been so difficult to leave badges of justice alone? Had Blizzard done exactly nothing, there would be no problem. New content would use the justice/valor system and BC would use its old badge system. No overlap, no potential for exploitation, no bugs to worry about. If level 85 players suddenly decide they want level 70 gear for transmogrification, then add a one-way justice->badge vendor, similar to honor. As for the LK heroics, screwing up LK content is entirely consistent with Blizzard's past actions, so there's nothing to worry about.