Detailed notes are good, but when you go to quicker cars it might become more difficult for the driver and/or codriver to keep up with the notes.
Somebody who was a test codriver told me that they had to simplify the notes from previous tests when they switched to the new generation WRC car.
I've difficulties to understand everything when listening to Paul Nagles notes. Ifcourse English is not my native language, but I've got neraly no problems understanding Dan Barritt or Martin Scott. I can't follow it because it is too much information and there is no clear intonation because he has to talk so fast.

But, only thing that is important, is that driver and codriver understand each other. I don't think that is his biggest problem.