Ok,I'll give you some honest advice to ponder.
If your wife has a stable career and possibly equal or better benefits than what fedex currently offers,then you can weigh that.However,work life balance is non existent in this line of work,whether at UPS or Fedex.
Most likely you will not get home until after 7pm on most days,and consider the vacation scheduling that goes by seniority.
Summer vacations are out for at least 10 years(if you lasted that long),and anything near a holiday will be off limits.
If work life balance is truly part of the dilemma,then I can't recommend even in the rosiest scenario to leave the state job.