DType,
No - it is not a dumb suggestion. And after the Air France accident there was much discussion here on Proone about the virtues of having an angle of attack display.
However, in my view, one of the most basic parts of flying is to know the appropriate power and attitudes for each phase of flight. Others have already said it but - Power plus Attitude equalls Performance.
Whether this was something that might have saved this accident we will not know until we have seen the final report.