For the longest time, I never even knew there WAS an addon for the AH. Since WoW was my first MMO, I didn’t even know that the default client was that bad (really, as far as I’m concerned, the only “bad” thing about it is that I can’t sort it to exclude a bajillion pages of single item listings). I prefer to play with as few addons as possible, but if Blizzard is not going to do something about this then I may have to.
I REALLY do not like being forced to use an addon because a few players are douchebags though.