People looking for a Diablo 2 experience with fresh new monsters, quests, and entirely new skill sets should check this out:
http://modsbylaz.planetdiablo.gamespy.com/
Median XL is a total conversion mod that makes Diablo II very very different.
As for Diablo 3, I'm expecting it to be Diablo 3... not Diablo 2.5.
I don't know about the rest of you but I intend to keep an open mind and not be too judgmental before actually playing it.