Corvature Tool and B-spline

Curvature tool.
Good day to all - questions to those who are often forced to draw something quickly with curves in the illustrator.

- Can the curvature tool move several selected points at the same time?
- If the shape of the contour is a little more complex when adding a point, the shape breaks and additional unnecessary points are added to the curve, thereby making it difficult to edit - can this be somehow overcome?
- Do you use any add-ons for illustrator that allow you to draw curves with B-splines? (for example, like corel).

Thanks!

There is a very old, but outdated software "Expression 3" in it, the curve is drawn with B-splines, the desired shape is achieved by adding points, but you can move a group of points, nothing extra is added to the shape, drawing is very good. fast and accurate.
In principle, I don’t digest Corel and I don’t recognize it - although it has B-spline curves.