Animation control points over time

A tremendous tool would be to be able to animate points on a curve over time.

So say you have a cut-out character doing a walk cycle, you could animate secondary motion on the fly by just dragging points on a curve over time.

This would also allow to animate mask on the fly on a character to simulate shading as seen on many anime style of animation etc.

You can use the morphing tool for this.

I can see how it might be quicker if you can directly move the points but it would only work well for pencil lines not strokes.

Morphing works well for both.