No problem about it being a lot of work but I think it would get pretty confusing for some to have the function you propose. There are the possibility of many racks so sorting it out would be necessary to know one from the other whereas there is only one Master Output. I guess you could use the rack index numbers to help out but they depend on keeping the order of the routing list consistent.
FWIW Brad pointed out that he had created functions to shorten the expressions shown in the thread I pointed to.
e.g.
$(formatGain(CCToGain(cc(7,1))))