I don't get the relevance? The consumer still pays the same price. And i don't think "100's" worked on MW2. Infinity Ward only has a little over 100 employees atm.
They outsourced a of their stuff whereas I'm not sure if Respawn has yet. The point was, you can't expect less people to make more stuff.
Moreover having more doesn't mean it makes one less valuable than the other... both cost $60 but at the end of the day it's the value to the consumer that matters most and not map count (especially when we have no idea if the other maps are good or horrible)