It would be very, very useful if synced type lighting could be restricted to only reacting to a certain key. For example, If i wanted it to send a ripple across everything when i click with my mouse, but not if i'm typing or otherwise using the keyboard.
I don't know if this is perhaps a feature on devices fancier than mine (k70 rgb, scimitar pro), but its something that I feel would give room for creative profiles. Perhaps also with a less restrictive tail length and velocity measure for synced ripples, but i wont ask for too much.
(that, and non linear gradient shifts, but that's probably restricted to the color gamut of different leds)