Stay away from FZ, you WILL be disappointed.
I would trade my place with you in a heartbeat. Trust me, there is nothing special about being an airline captain on a 737, especially with these clowns at FZ.
If the job you have at home pays well and your family is happy, then stay put. The rosters here are appalling and have been since the company began operations (with the odd brief respite).
Seriously, FZ is an accident waiting to happen, and many, many pilots are leaving like the proverbial rats on a sinking ship....
Good luck and I hope you make the right decision.
p.s. who do you work for and what's their contact details...... just in case :-)