How, how and how?
A. the dungeons are already fairly interesting for why we go there and the looks of them this is more subjective then anything.
B. We've already been over this either everyone almost kills everyone all the time or it won't be a "challenge"
C. Was some of the best gear at any given patch cycle not reward enough?
This is an mmo everything turns into a mindless grind after a while. If it retains its challenge the content is only done for a few months at best after release and is never touched again