Super-guild has already cleared Naxx

[Swiss Mercenary]

I kind of like the idea of a hard push on a user adjustable difficulty knob.

Where's my blindfold?

Most great games have some level of handicaps to make them difficult. Look at the number of Lurker Lounge people who had to make arbitrary limitations in order to make Diablo or DiabloII difficult.

I wouldn't consider the mind-numbing simplicity of 99% of Diablo (II), and the associated handicaps to make it somewhat to very challenging a good thing. Variants were things of necessity, rather then something I'd applaud as a good example of game design.