Default Variant Custom Field Data from Parent

Would be nice if in the field configurator there would be a checkbox (on the field definition page) enabling product level field data (when filled in) to be the default field data in variants (still capable of being uniquely defined if desired). This way on a field by field basis we can choose which ones carry thru to the variants thus minimizing duplicated data entry and/or CVS file manipulation.

Example:  Fly Fishing Rod

A fly rod product is staged in Shopify with two variant attributes (Rod Length and Line Weight).  One of many common fields for a fly rod that would be the same at the product level as it is at the variant level is "Rod Grip Style" (wells, reverse wells, cigar, two-handed).  The choice of grip style does not change for the variants.  Rods can be Rod Lengths of 7ft, 8ft, 9ft, 10ft and etc... with line weights of  2, 3, 4, 5, 6, 7, 8, 9, and so on.  You can see the sheer number of variants that need to have the Grip Style populated just for one parent product.  If we can tag a custom field as default for variants and just fill in Grip Style once at the parent level we would see it filled in for all the variants.  We would also want the ability to edit the field at the variant level if needed.

Thanks,

David