I would think if I worked at Nokia and we were acquired by Microsoft, I'd probably be looking for another job fairly quickly. Considering the writing was on the wall for a while even before they were acquired by MS.
Those who stuck around through the merger and take take the first-round cuts offer will likely make out pretty well. Unfortunately for Microsoft, this means that they're largely paying for people with good strategic skills and a high capacity to find work elsewhere to leave.
It's the ones who stay put, largely out of lack of strategic skills and/or alternative options, who are going to be less valuable to the company. There may be further incentives but they're likely to not be as generous.
Or so say the rational expectations theorists.