I cannot keep up on Overseers. Though in the beginning there were too many at this point I have loose workers without an overseer. This is occurring because of the high mortality rate of those working in NCO jobs. Think I have lost 3 or so from that alone. Because of this I have to quickly assign regular overseer teams to militia thus losing another working crew.
This could also be solved with expanded work crews, which I believe the developers have mentioned is potentially on the table. It is always fascinating to see the law of unintended consequences in action...