Summary:
If you create a road with the new building system and save it as a template it will not go into the ground but 1 block above it Steps to reproduce:
Place a Road with the Road Tool
Save the Road
Place the Road Template
Expected Results:
In the ground like normal roads Actual Results:
above the ground not like it was saved
I think a better idea would be in the same GUI for building, because to be honest I also just found out through your comment, that there are loading screen tips, my SSD seems to load too fast.
Why not an small corner on the top right that says “shift+,” template down