The purpose of Ayth_Quest is to show you the closest objectives for your quests, quest givers, harvesting/farming nodes, and path objectives. The inclusion of path objectives and harvesting/farming nodes is rather new to Ayth_Quest so they may not work 100% as intended. I know my settler doesn't get any lines drawn at all for it's objectives, but Aytherine is constantly updating this addon and I'm sure it'll get all paths working soon. As you can see in the image below, Ayth_Quest shows you which objectives are the closest by overlaying dotted lines that point you right where you need to go with the distance also thrown in for good measure.