I'm sure everyone has heard that Diablo III got an expansion on the PC. As a special bonus, they got rid of the auction house for the base game too, and reworked the loot system to (gasp!) drop level- and class-appropriate items. Also, the game (gasp!) automatically scales the bad guys to your level, and the difficulty levels just amp them up from there. It just (gasp!) works.
The auction house broke the game, plain and simple. Trying to create that revenue stream completely buggered every piece of the game experience that it touched.
Much kudos need to go out to Blizzard for doing the right thing once they had exhausted all the alternatives.