Never said I wanted to play Diablo, read from the top and work your way down. The issue is people pretending like playing your friends character and being forced to start the game over when your friend quits the game is fun. It's not and again, there are fixes for this.
You don't want to understand it, do you? This is only possible if your character is stored online which is not an option here because nobody here wants an always-online experience.
Second, Diablo 3 is a stricly linear game without any options, freedom or branching stuff (don't even try to argue with me here, I've played every three Diablo games intensively). You just kill and loot. That's everything. Diablo is incredibly limited in terms of "game states" compared to D:OS and that's why hop-in/hop-off co-op is so easy to implement there with its server based solution. Just because someone puts to games in the same overall genre doesn't mean they are the same. Diablo isn't really an RPG anyway, it's more or less a loot-based acion-adventure with RPG elements (leveling). Game design is a bit more complex than just seperating shooters from everything else...
