I totally agree, but then I don't think Diablo is an RPG.
games are Role-Playing Games :P
I know, I know but I've always thought RPG was a poor choice for naming that genre anyway, far too late to change it now obviously.
As I understand it, Blizzard North had a tech demo for a Diablo 2 "clone" that was set in a sci fi environment. I remember reading something about it a few months ago, it obviously never saw the light of day, but looked awesome.
Reminds me of that Starcraft Ghost game that got scrapped, real shame, this was at a time when I actually respected Blizzard. Oh well, sunrise sunset.