Now that Blizzard feels their engine is solid, it’s time to move on to creating content for the full game. Jay Wilson, Diablo 3‘s lead designer, says the game engine is in an advance stage of completion and much of the art team has moved onto Act 2. Don’t read into that, he said game engine.
Blizzard is obviously not hurting for money, given the success of World of Warcraft and they’ve always taken their time with projects to make them solid products. Blizzard’s name is on the line and they’re brand consists of three major franchises: Warcraft, Starcraft and Diablo. When you produce so few games you’re expected to do them perfectly.
How do they do it? As Wilson says, “If we haven’t rebuilt something five times it really doesn’t deserve to be shipped. That’s pretty much our policy.” (eurogamer) While a game engine is the foundation for a great game experience, the content is king. Blizzard is deep in the mire of content production so, although the engine might be solid, the final product is probably still far from complete.
End result, expect a high quality product once again from Blizzard.

As the Wrath of the Lich King beta lives on, the world (and software behind it) is ever changing. Apparently, the rune system has changed a lot since its first inception. This requires a delicate balance, as the goal is a well rounded Death Knight class without epically overpowered features. Too much power and people will feel cheated while others feel overly destructive. End result, everyone would be a Death Knight.
I’ll be preordering the Special Edition as soon as it is announced.