What, precisely, does Mr. Ewbanks propose as the significant difference? What are the design flaws?
I have no doubt the he believes what he says, but engineering often produces a plateau of similar ideas where any particular one might be better in some exact situation and is terrible in most others. So there is ample room for claims to be made that their particular idea is the one to solve all problems, but they actually don't solve all problems. It doesn't matter to them; they will argue to the death that their idea is best.
So, what is the problem Ewbanks is talking about and what is his solution? Would it have avoided the Pakistani crash by better alerting the crew to their problem or is this a Boeing-only human factors solution?