Old guy here, hired at the tail end of the postal contract. Voted no. Almost left myself after 2 and a half years when still on reserve in the back of the 72. Stuck it out mainly because of our A fund. Million dollar difference over my hoped for lifespan if we don't dork it up in TA2.0 and I make it that long (say 85).
I will say this: if there is any way you and your family could tolerate living in domicile for one of the majors you are considering and understand the risk of industry downturns (which you obviously do) then I would seriously consider taking the job and moving to a domicile. Yeah its a risk and the grass isn't always greener, but if you have such concerns (and they are valid) then perhaps you'd be happier on the pax side.
I'm sure its an agonizing time, but as Thrust Hold said this is probably just a blip and in a couple of years things will be on the upswing. With about a year and a half to go, I am content with my decision 20 years ago, but only you can decide for you and your family if you are ready to make that jump.
I wish you the best in your decision and career.