Chill is nice, for games that are applicable (non fast-paced games). Chill [basically] activates when you stop moving your mouse, so...
I do miss FRTC (static FPS cap by automatically adjusting GPU frequency). That should've never got canned.
Further power/heat/noise savings can be achieved via manual voltage settings in the Performance -> Tuning tab. For instance, my 1305MHz (State 7) load state is set to get 1040mV. On auto voltage, it gets 1075-1150mV.