As a competitor to Facebook, they're sinking. But if social networking in this capacity turns, taking their medicine now for poor-sighted assumptions could make a so-so company poised to look smart in hindsight, should they right the ship.
I agree, there are major disadvantages to having this kind of link to old industry money too(being slow, hackneyed CEO culture, etc.) But, Murdoch is wily and buys talent.
I wouldn't bet against them; if for nothing else, their vehement protection of pride.