While I think the argument has been hyperbolized to some extent here, I feel the core is still valid. I likely won't be able to play this game much, if at all, anymore due to other time commitments I have, and my experience with the game has been less than what I was hoping; specifically due to the AH mechanic.
Personally, I'm compelled to min/max, and I appreciate games that retain their difficulty when I do this. The feeling of trying your best, and it still being difficult is something I enjoy when I play games. This is why the argument that people should just "avoid the AH" doesn't hold weight with me. Now, I freely acknowledge that this min/max neurosis I have is atypical, but for me, I'm not having as much fun as I would expect given Blizzard's track record.
I'm not saying it's a bad game, it just strikes me as odd, and somewhat disappointing, that the balance would be so out of whack while using in-game mechanics, and without "gaming" the system, as it were.