I suppose if you were a glimmer hound and that cost bothered you. Otherwise you could just switch out mods based on what you were playing. The only difference could be in the base roll itself, but then again I dont envision you master working multiple armor sets, for a few base point adjustments. I believe the intention was to find the armor that suited the class you wanted to play, and maximize. They wanted decisions to mean something, and the drops to mean something. Personally I plan on using 3 characters as builds, not multiple builds in each class. So void warlock with disclipne, and weaken mods, melee hammer titan with melting point focus, ect... not 3 different builds for 1 warlock. But I suppose that is personal preference.