Taxiway route editing UX is unclear and onboarding guidance needs improvement

Great start to the game! I found some challenges understanding taxiway routing. I like the auto generated routes, but it was not clear to me on how to change the route. Clicking on the small dots often produced unexpected results and backing up a route to an a closer point to the aircraft is inconsistent. I figured out that I can right click on some nodes along the path to back it up or undo the route. The tutorials did not cover that yet, but I am sure they will.

Recommendation: Make the nodes that have already been manually selected, bigger on the route so they can be easily seen to remove.