One of the things I would love to see in MoP is less of a spoonfeeding of a linear story as we have seen in Cata.
It all feels a bit console gamey. The new heroics are particularly bad. Fun experiences the first time, but it's all rather "Culling of Stratholme RP bit" after the first couple of times. I want to claw my eardrums out every time I hear the first boss in the third dungeon talk about Thrall the "shaaaaaaaaman". Unfortunately all this story has been added into these dungeons to disguise the fact that there's only 5 minutes worth of content in each, stretching them out to 20.