I deleted my LinkedIn a few years ago. It could very well be useful for networking, but it's also a trap. There are people I know that can only selectively use LinkedIn, and their profile only reflects what they can publicly disclose to their employer. LinkedIn can get you in trouble.
I know that MS and LinkedIn don't give a fuck about me, or my network of coworkers, family, and friends. I just don't want to use that kind of instrument.
At any rate, I expect MS will make users upset as they try to monetize and integrate it.