I am seeing lots of people be disgruntled and pulling the plug now (not even waiting for CIP or a chance to participate in next year's hunger games). People as disgruntled the way the company has gone. This is not only those on the verge of retirement but early/mid career folks as well. There is lots of work out there and from ending.
All things like this uncertainty, direction of the company, lack of growth, "change in culture", etc is causing a surprising level of natural attrition. Now you throw EOI on the table and the incentive gets a little sweeter (assuming they honor it). Problem with EOI offered unilaterally is you get some very good people to leave.
All of these factors: Natural attrition and incentivized attrition (EOI) of near-retirees and those who don't/won't leave CA, plus getting rid of some obvious deadwood and the head count reduction might be higher than management was expecting... plus soften the impact for those that will chose to stay.