The "origin" means the coordinate (X0,Y0).
I used Cura3.2.1 to test, in the dual nozzle printing, there will still be three blue lines trace back to the origin of X0Y0.
This does not seem plausible in layering...
But if it is a single nozzle print, there will only be a beginning blue track, which is normal print.
Speaking from my use perspective, I personally think that the Adaptive Layers functionality is one of the best things to be added to the Cura in a long time. For the most part I have found it reduces my average build time of a part significantly. As much as an hour on a 7 hour build with a base layer height of 0 .2.
I would really like to see the ability to set the "Adaptive Layers Maximum Variation" and "Adaptive Layers Variation Step Size" as adjustable individually for top and bottom, much as there are those settings for top and bottom pattern and thickness.
S3D does this, but it's very difficult to implement. Maybe in the next release while it's still considered Experimental?
Anyway Kudos to the Cura team for even taking a shot at this very desirable feature / functionality.