Resolution-dependent values: Is basing off grid name "good"?

This is sort of inspired by https://github.com/GEOS-ESM/GOCART/issues/18, but it reminded me of code in, say, Moist GC like this:
https://github.com/GEOS-ESM/GEOSgcm_GridComp/blob/e0cf9fabbe700c3e23571466f444973dd6b20e4e/GEOSagcm_GridComp/GEOSphysics_GridComp/GEOSmoist_GridComp/GEOS_MoistGridComp.F90#L6120-L6128
and:
https://github.com/GEOS-ESM/GEOSgcm_GridComp/blob/e0cf9fabbe700c3e23571466f444973dd6b20e4e/GEOSagcm_GridComp/GEOSphysics_GridComp/GEOSmoist_GridComp/GEOS_MoistGridComp.F90#L6156-L6158

I'm wondering if it would be better to express this in terms of, say, AREA from FV3? I ask only because if we ever get the stretched grid working in GEOS, I'm not sure what this code will do. Would it use an "average" value? So the fine-grid-area of the stretch uses a value too "coarse" and vice-versa?

Not sure. But I thought I'd ask the scientists. (The first swath of people I'm tagging are the Moist Team as that's where this code is from...)