I've started with massDOT to cleanup the offshore town and county boundary relations in Massachusetts. Our plan is to use the offshore portions of the town boundary layer without coasts and connect them up with the existing town boundary layer from survey points which is up to date but lacks the offshore layers.
At the same time, we will add the relevant county relations to this newly imported ways. Suffolk County is more or less complete, I am planning to do counties north, and massDOT counties south of Suffolk. Anyone else interested, we can co-ordinate on the Massachusetts/Boundary Relations Talk page.