Ok, thanks!
1. The plugin works perfect as it is, so it doesn't really matter for me.
2. That's what I assumed was the problem. In my case however the difference is very small. I'm modelling a highway interchange, using offset for the width of the roads. So there's no need for all those extra control points. That's why an extra option might be useful: in a lot of cases, a curve with the same amount of control points would be precise enough and more convenient overall. In other cases the difference would be problematic of course.