I forgot to mention that part. I'm sure you can poke around with the MPQs using WoW Map Viewer, though...
Already did, most was done already however by the Nogg-aholic teams and posted on Curse-Gaming though. A lot of the new things Blizzard added were really not impressive, I doubt I'll even buy expansion.
Have fun being level 60 forever.
Also, it's worth buying.
There is one expansion feature that will be implemented into non-expansion, and ironically, that's level 70.
He'll be getting shit exp, but he'll actually be leveling up in Molten Core and Blackwing Layer.