Good points. During the ALPA call-in show last week one astute pilot asked how we decide what the FCs are and can the company just change them?

One person answered that FCs are listed in the CBA. The CBA does contain a definition -
“Focus City: Any city publicly identified as such by the Company or any city where Pilots are Based.”

But I have not found any such list of focus cities in the CBA. So this may be a loophole that the MEC/NC has not discovered yet.