What I would like to see:

1. Be able to preview blinking (L/R eye) in facial mode with the press of a button.

2. Be able to edit eye control points *while* seeing a thumbnail pic of the eye in the closed position. 
   The closed eye position should automatically update while editing the control points, so we can
   best remove any distortion.

Some more:

3. Slo-mo blinking preview.  Or be able to use a slider to fully open and fully close eye at any position.

4. No matter what I do, I always get eyebrow smear when blinking.  So instead of using
   real eyes or fake eyes, how about a third option: real eyes + fake eyelids?