Animating Line with 3D Tracking Help

Hey guys, I've searched and searched but can't find an answer to this particular question. I'm trying to animate a line along the path of a flying disc. I regularly do this from stationary cameras and use a solid layer with a pen tool drawn path. I generate a stroke and animate it with key frames along the path. Now, I'm trying to mimic this same effect, but with a camera that is zooming and following the frisbee through the air.

I have camera tracked the clip and have some good 3D tracking points. I selected three of them and created a null layer. On this null layer I drew a path that follows the flight of the disc through the air with the 3D tracking. What I cannot figure out is how to properly animate a line in 3D space that follows the flight of the disc. I tried creating a solid layer from the 3D tracked points, but the more the camera zooms in, the more the solid gets blurry and the generate stroke gets very blurry and doesn't work.

Is there a way to make a shape layer and attach it to the 3D traced path? Can I use trim paths tool to animate the line through the air while the camera zooms. The line will be leaving the frame as the camera zooms, and that is fine. I don't want the line itself to become blurry from zooming, but to just remain locked to the 3D tracked background.

TL;DR - Need to animate a line that follows a frisbee through the air. I 3D tracked the scene and created a null layer. Then drew a path on the null (seems to be paired to the 3D camera). The path zooms with the camera. I need to animate along this path without the animated line getting blurry as it zooms in.

EDIT: Something like this would be amazing. Hole-by-Hole flyover with ball trace animation sample on Vimeo

Thanks!!