A reader who reads more than just game blogs sent me a link to a blog about innovation, where already in April there was a great article on Blizzard's innovative design process. Who said Blizzard wasn't innovative? At least their business practices are considered to be an example of innovation by some experts.
And their game design? In a follow-up post the author considers the claim that Blizzard just copied existing stuff as too harsh; he says: "In the American West, for example, pioneers included thousands of early settlers, not just the first few to explore the land."