The editor will be reworked, that there is just the first basic version.
Jumping to the edited node, that's a good idea. It could preserve the distance and orientation wrt the edited node the same as the one used at the previous one, it would be annoying if it always reset you to a top down view when you are adjusting the slant, for example.
There's a maximum allowed distance between nodes, if you jump too far it will add additional nodes in between. The transitional distance tells the width of area that is used to blend between road sides and the original terrain. Larger values make the corridor wider and the side slopes less steep.