Oh, don't get me wrong I love the idea of RP appropriate routes. But the basic tenet of human psychology is to try and min-max everything.
So unless you make the RP commodities at least as profitable as ores most people will still go for ores most of the time. (And you can't do that as ores are limited and regular commodities aren't)
So I'd rather have people shipping ores as USI or Gateway then picking up the RP run as a transition than seeing people shipping these once a month when no ores are available.