Perhaps having pilots actually read the two below documents might help:
Federal Aviation Administration Human Factors Team Report on: The Interfaces Between Flightcrews and Modern Flight Deck Systems, dated June 18, 1996, at:
http://www.tc.faa.gov/its/worldpac/techrpt/hffaces.pdf
Operational Use of Flight Path Management Systems, dated September 5, 2013, at:
http://www.faa.gov/about/office_org/...mendations.pdf