Ok, two points. First, the no offline support is just a different take on DRM that I honestly think is more palatable. Instead of saying it can only be installed on X computers, you can play on infinite computers, fully transfer all characters, at the cost of signing in with your user name.
I would understand if everyone who has a problem with this has a spotty or no internet, but that is not the case. I am sorry to those people with spotty internet, you cant play TF2, any MMORPG, or Brink. But the loudest people are the same exact people who have a problem with every other DRM/anti-pirate device. I would bet %50 percent of the "boycotters" are just pissed they can't torrent the game, admit it.
Second, the auction house is NOT the same micro-transaction model seen in other games. You miss nothing by not using it, nothing is locked out of the game. You will have %100 of the game at release, barring the good chance of an expansion pack. The only benefit people that use it have is they don't have to farm. They still have to play through the game to get to the upper levels, just like everyone else.
So, if you are boycotting a game for strictly moral principles, make sure the designers are actually doing something wrong.