One more vote for getting the hell outta Dodge
Congratulations on your ability to have a choice. You've already had plenty of feedback to help you make a good, logical decision.
Not to reiterate, but my work at MegaCorp is similar. So similar, it's scary, Ten years in, I've got about 2.5 years left, as well. Unless something like your situation happens.
Here's my two cents.
1. You'll never get this time back. If you have background health issues or family medical issues, you need to go, now.
2. The next two years of work will be absolute hell, guaranteed. "we will break you", I just lived the last year through this situation, it's been awful, destructive, demotivating, in my opinion, almost disabling. 60 hours per week is discussed, I won't work it, life is too short. The pressure is immense. I'm trying for a package like yours, hint, hint.
3. The package is as good as it gets, nowadays. So far, our offers have been only two weeks/year max, 12 weeks. Heard through the grape vine another 150 guys in a couple of weeks, because they can. No other good reason(s). This will make a bad situation, worse.
4. UI will make the transition much more palatable. Retraining benefits are great fun, btw.
5. You can always find part-time work, if you need something to fill the void. Employers don't want to hire full-time employees, but, part-time jobs are always available. Personally, I'd spend the time on your health and demand side budgeting.
Bottom Line: If I had your situation, or even close to it, I wouldn't let the door hit me in the butt. If you are anything like me, I know for a fact, you won't miss it a minute. Cheers...................