Something disturbing is the case, that in a parametric software occurs an overlapping in the sketches. As the video below, I show a overlapping between a short and a long line, that are on the same axis and plane. I think, that this overlapping shouldn't exist. Only in the case of a construction line, could be useful, but having many lines as wanted "inside" a big line is confusing and produce a dirty sketch. The long line should replace the short line (if you want, replace the short line with a end point in the long line). The same coordinates of 2 or more objects should be replaced with the longest sketch.
I hope, that my idea is clear.
Thanks