No need to tinker. It's not like when you buy a startup that's bleeding money with 50 engineers that you could add to your existing products.
Facebook with games? HN's community and most people who would buy something solely for games would disagree. But who knows, maybe we'll see Facebook operate a successful diversification strategy by perfectly catering to both casuals and hardcore gamers. Unlikely but one can dream...
Yeah, corporate acquisitions are often not in substance what they are superficially described as...in technical terms, Disney "bought" Pixar, but they did so entirely with Disney stock, $7.4 billion dollars worth, and made Steve Jobs by far Disney's largest single shareholder, and, while Pixar remained a distinct entity within Disney, much of Disney's management was replaced with Pixar management (who retained their roles in Pixar, as well.)