I’d love to see Plasticity add curve-editing tools similar to Rhino’s Smooth and Fair commands. They’d be especially useful for cleaning up profiles and guide curves before creating lofts or sweeps.

Smooth would let me relax selected control points to remove small bumps. Adjustable strength and an option to lock the endpoints would make it easier to smooth just the area I’m working on.

Fair would help even out unwanted changes in curvature while keeping the result within a tolerance I set. It would also be helpful to preserve the curve’s end tangency or curvature when it needs to match neighboring geometry.

A live preview that overlays the original curve would make it easier to see how much the shape changes before applying either tool.