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So, gen VI added a few minor buffs to a couple of types, giving them some innate effect that had nothing to with type match ups. For example, Ghost can now switch and escape from anything, and Grass types are immune to spore and powder moves. These effects may not be very major, but they are neat little buffs that provide some flavor and helps to differentiate them from other types. But then there's the issue of all of the other types; why don't they get anything like that? So, why don't we brainstorm a few innate effects like that. It doesn't have to be anything too major, just something to theorycraft. For example, Ice types could have a special defense buff in hail, and maybe Fire types have an extra 10% chance to inflict burn with Fire moves.