I would like to suggest direct hatching of polylines or curves like you can find it in some other CAD software. If a curve had a hatch property, you could choose to either enable or disable hatching of this curve. This way, it would be easier to edit hatched geometry, because the hatch would automatically change if the curve is edited.
Currently, changing both curve and hatch is inconvenient to be honest. Couldn´t this workflow be streamlined?