“Curves with Control Points” is lacking a key design element to make it useful. Currently it starts drawing the line from the first point entered, immediately headed toward the first control point. This causes the curve to look jagged at the ends where other lines approach. In order for the curve to be smoothed with the neighboring curves there needs to be control points outside the start and end so that an approach and departure angle can be established.
Here is what it should look like:
ControlPoint --> StartOfLine --> Control Point --> Control Point --> EndOfLine --> ControlPoint
Example of a change in direction between two Bezier curves (A17a3 is where one curve ends and the next curve begins):
Note the detail where the two curves meet. Because the curves are unaware of entry/departure angles they do not blend together.