I am struggling with the rat lines as well but in my situation the "Closest endpoint" setting is not functioning properly. I opened a case over 17 months ago and I was told this is the way the tool is designed to work.
For instance when I finish a route and exit the command I see the rat line extend across the design to a pin to my plating bar when I have a via 100 microns in front of the end point of the route. I just opened another case since this is a later release and I am told the tool functions as designed and nobody else has asked for an enhancement.
I remember back in the day when User Groups were strong and the users would all have a presence to openly discuss issues with the tools in front of the developers. I miss those days because other vendors were responsive to those open forums.
There are many tools on the market both cheaper and more expensive that have the ability to show the rat lines from a route to any of the closest end point (i.e. via, pin, bond finger, etc.) that provide the designer a very helpful guide to plan accordingly at a glance where to route and how to get there in the path of least resistance. I do not have that using this tool and feel like I am not being heard that this is indeed a problem.
Anyone else have this problem?