I'd lay the blame on Blizzard's poor groundskeeping when it comes to old world content. They've come about as damn near close to giving new players level 70 characters as they can without actually just giving them level 70 characters. Problem is, those improvements are all from the perspective of the more commonly used leveling methods, ie, solo questing. It more or less leaves multiboxers sitting there with the older, slower methods of leveling, and it hits us in the time department.

Good luck getting them to do anything about it though. Then again, every time I quit and put a cut-n-paste response on 10 accounts, they tend to fix whatever the issue I was quiting over is.