There was an artical in last weeks Flight International that I thought was very good. I believe it was ALPA that had some suggestions for improvents in the flight displays.
I fly the 737NG. I'm also a trainer and one thing that I see alot is confusion as to what mode the autoflight system is in. The Flight Mode Annunciator, FMA, would give this information. However since some of the buttons on the mode control panel sometimes illuminate to indicate that the mode can deselected, many pilots incorrectly use that as an indication of the mode rather than the FMA.
So what I'm trying to say is that the FMA must be very clear and easy to read. It must be very obvious what mode the AFDS is in and when any changes to the AFDS status occur. There is definitely room for improvement in this area.
Unfortunatelly I don't have a good solution to the problem so I'll leave that one up to you.