Just finished a job which was ruined because there was cut line hidden behind scan actually right at the edge of the scan area/ so it was not visible in design or preview mode but was sent to the machine. It was me that put it there so no blaming anyone.
I suggest if possible in the preview window to have scan and cut parts of the design with different colors so you can clearly see if there is problem such mine. Now everything is black and hard to catch it
There is a website specifically for suggestions where other users can vote on them. I suggest posting your suggestion here so that it could be properly vetted and voted on
Oz and the team are really good about responding to posts there as well!