While not one who suffers from more than just sound triggers for migraines when playing (that's what my volume controls are for), I'm more than aware of people that just can't handle everything from certain motions to flashing content. That's why some games/movies/etc will put a warning at the beginning in situations where there's no ability to control such things. Luckily, we have settings as described above (that I actually planned on writing up if it hadn't been) that give you full control over the majority of what could be triggers. Now I don't recall seeing it, but is it possible to perhaps make a GFX mod (would have to cover all powers and be updated over time) to alter what these things look like on the end-user's side? That way, between the settings and the mod, a customizable method would be available.