I've been guilty of ignoring the map missions, preferring to call contacts for jobs with the frequency and vigor of a 14 year old girl who has a new iFidget. But it turns out there is a least one map mission that is worth taking a look at. Coveted.
It's fast if you want to play it fast. It offers practice opportunities for sniping, general riflery and even flying the Cargobob. It's a good mission to practice teamwork, or test a possible recruit. It's no pre-Nerf "Titan" ....but it pays $12,000 every time and can be replayed since it's a map mission. Press square in the voting lobby to shave a few seconds of down time away with the restart.
Any other good ones you want to share? I'll have a look for some more after I walk the dogs.