Spacial and Temporal key frame assistant with masks.
Add Spacial and Temporal Key frame options (Bezier, hold, easy ease, etc.) to masks and mask paths.
Keith Johnson commented
Perhaps just the HOLD option for starters. I can see how the other options could get tricky on multiple spatial points around a mask. But the ability to NOT interpolate the mask from one keyframe to the next ought to be relatively simple to implement, and would save a bunch of work... in my case, locked down shots that only move once in a while. Setting a start and stop keyframe is ok, but annoying when you make a change and have to duplicate to teh 2nd keyframe every time. Thanks for considering this.