Going back to the title of this thread " Owner Assisted Annuals are Now Outlawed unless Supervised 100%. " Doc, I agree with what you have pointed out and that the FAA is not going to stand behind the A&P and ensure that he is standing over the apprentice.
Just like it's always been, the apprentice needs direct supervision during their training. Once the apprentice has proven their knowledge on a particular task they can enter that in their 'Maintenance Log Book'. Then they need to present that MX Log Book to the FAA to show experience towards taking the A&P test.