Optionally, provide a different grid setting for each, or make the ‘subdivision’ only apply to the off-curve handles.
I’ve had two projects recently where this would have come in handy: One is a sans serif with small details that were best interpolated and drawn with floating coordinates, but otherwise consistent stems. Using floating coordinates made it very hard to proof the spacing and stem widths. The second is a LED/pixel font with round dots. I want the pixels/dots to snap to the coarse grid, but rendering each ‘pixel’ as a circle requires more fine-grained control.