This is all about maximizing shareholder return, and it will always work out better in the short term to allow someone else to assume the risk (as in, take the company private, and let the new owner shoulder the risk). Would you rather have ten dollars today or a fifty percent chance at thirty dollars in two years? From a finance perspective, the risk-reward ratio comes out in favor of waiting. The problem is quantifying odds and value in the real world, which is why they're conducting the exercise.
As far as killing off the nook, that's the brightest, shiniest star of the company. That's not going anywhere.