I’m not sure why there is so much whining. My guild does several dungeons runs each night. As far as I know that’s mostly what is being done, people leveling are doing story and level 80s are doing explorer. I have done many of them myself and I can’t say they are really all that hard. I have never done a single PUG though. I believe it really requires coordination and in-depth knowledge of your class. You just really need to spec so that you synergize with your party members.
However, what I do find disappointing is the rewards. Spending an hour figuring out how to kill a boss and then actually killing him only to get rewarded with some low level blue or white is sad…
To sum it up: Leave the difficulty as is. Fix the annoying bugs. Please do something better with the rewards, I feel they should be a bit more rewarding.