elemental damage should be based off subclass and light should affect this rather than a "light level" honestly. So at 350 light you get 5% of the damage you do as an elemental(based on sub) where 400 light would give you 30% of damage as elemental and maybe have the % be determined differently based on weapon type. This could allow for "variety" (bungie I'm glaring at you) and would make more sense as your light increases the potency of you light in the form of elemental damage would rise( flames burn hotter for example) now for specials and heavies this same theme would apply of increased damage (to a lesser degree because of there higher base damage values). classes could have trees expanded so subclasses make you more proficient with the matching your sub's element (faster reloads, more surplus ammo) and/or perks on weapons/or subs that give bonus affects to using matching elements like fire burning npc enemies and preventing health regen in pvp(without burn) just a thought.