I'd do that, if nothing bad happens, you've got until April of 2015 to put the money in...
This is not true for 401k money. Is true for IRAs.
OP, I think your plan sounds reasonable for this specific instance. Odds are even in a lay-off you'll end up with severance and credit cards to get you until the next gig, but some extra safety could be well within reason.
^ This.
Not a bad thought OP, although 1 year of expenses already saved in EF is a pretty nice cushion, so don't do anything too drastic.
If you cut some of your retirement savings, cut the Roth first for two reasons. 1) As Moose pointed out, you can pay that all the way through 4/15/15, but the 401K contributions must be made by 12/31/13 and they tend to have more regulations put on them, and 2) I'm a big fan of the tax deferral. I love Roth's, but only if tax deferred is already full or you have a more imminent need for the cash soon.
Also, the recession is long gone and I've seen a pretty solid job market out there. If you have solid professional skills and experience, and there is demand for your services, I wouldn't change a thing given your savings.