I was annoyed and frustratd with Northrend MB lvling until I dinged 80 looked at my total played time and realised at about 10 days played divide by 5 isn't so bad ,2days per char)considering what I have at the end of it.
Now i'll hit dailies and farm that gold like a fat goblin.
You tell me what a single player really has at the end of it?
I didn't enjoy the process TBH it was hard,but i'll be doing it again sure,im back in OL now and its strange but I kind of miss Northrend already,the old world seems a bit bland.
I say give it a little time enjoy your gold and instance farming/pvp,and come back to it in a month or so.