I think they're trying to make up for introducing Naxx only a few months before TBC, but they're kinda going a little overboard this time.
On one hand, I want to go through the original experience to get to BT (even though it's already easier to get INTO it), but at the same time, I DO want to get through it quickly so I don't miss it before Lich King comes out. God... I can't wait for the expansion. Level 70 is such a bore on non-raid nights.