Realizing that any labeling system must be easy enough to be understood by a beginning fly fisher, what system would you suggest to designate both the line(s) and the rod(s) which are designed to cast them?
I think the entire head wt. on weight forward lines should be printed on the package. If the manufacturers want to stick a number on it in addition to the head weight then that number should reflect the entire head wt, not just the first 30 feet of it.
Rod manufacturers could then either specify the rods as they do now, by one or more line wt numbers, or a weight range.