The tone so far is: We feel that players have enough marco lines already BUT we are looking into a way to equip an entire armor/weapon set in a single macro. I don't know if the reasoning behind this is truly about RMT or it is being used as such as an excuse to say: We can't add more macro lines due to PS2 limitations but we are working a way for you to equip an entire set of gear in a single macro line.
I agree that something has to be done with the current macro system. It shouldn't take 4 macros to change an entire set of gear (making me invisible half of the battle). I am happy with the ideas floating around with the compromise they are making making to fix this thus far however.