Rotobezier / X-Spline Handles
Add tension handles to rotobezier (x-splines) so they are easier to edit without a modifier key.
Basically, just steal how MochaAEs X-splines work, they are great.
Roei Tzoref commented
definitely. X-splines or B-Splines will be most welcome. the rotobezier has the disadvantage that when you add a vertex, the path changes slightly.