Orb generation should just be an effect for weapons at this point. Maybe tone done how quickly we can generate them but otherwise there's no reason to make it take a mod slot. Especially since you are right, we just don't have the energy OR the mod space to do it. Like come on, I really don't care that I can't generate orbs with a handful of exotics and to require a cost for every weapon now beyond the basic material requirement is sad.