I’m not quite sure why that app works the way it does. The standard google map is a lot easier to plot routes with and it lets you share the route. I assume it is plotting all those points to allow you to save out GPX files, something google does not allow you to do. But I have done some searching and found another app that does a much better job with that part. I have converted a large 1000 mile route and a small local twisty route from google maps to GPS routes and it does a pretty good job at it. It only creates a minimal amount of waypoints (not 1000s like motowhere) and actually exports it as a route, not a track. So I can paste the route straight into my GPS mapping software and review it.
So far I have only found one small issue where it places two waypoints close together when you have to make a turn and the route then has you driving in circles trying to hit both waypoints. It does not happen very often and is easily fixed by deleting one of the waypoints. All in all I like this app. It allows me to plan my route using Google Maps where I can see the terrain, local photos etc and keep my use of the clunky MapSource program to a minimum.