My intuition is that this accident will lead to the thrust reversers. The Egypt Air 767 loss seems to have the same signature characteristics as the Lauda Air 767 loss. My understanding is that the FAA has no power to force their directives upon airlines outside the U.S. So while U.S. 767s may have had this problem addressed by the safety directive to have locks installed on the thrust reversers, there is no guarantee that foreign airlines have followed suit. As such, there is no way of preventing the Lauda Air phenomenon from occuring again. With so many 767s flying the globe, and eight years since the Lauda Air loss, the science of probability makes a second incident a certainty. Unless new information surfaces to suggest otherwise, it's probably the best explanation at this point for what happened.
However, don't hold your breath for the NTSB to find the definitive cause on this one. It could take months before they even float any theories around. It could take years before they state a cause. Or, like TWA 800, they may never have a definitive answer. I sympathize with those guys at the NTSB. The last few years have fed them one tough nut after another. Pretty soon their unsolved file is going to be bigger than their solved file.
In that light, you might as well let the speculation fly. That is what the Internet is for - exchanging ideas. That's why we are here. The only ones who should not speculate are the authorities. The flying public, on the otherhand, is not only entitled to share ideas on current events, but is obligated to do so by a social contract to which each of us is party, namely to always be diligent and thorough in seeking answers to questions that concern us as a society, remembering that official statements from governing bodies must be edited with political, financial, and legal reasons in mind. The only caution we must exhibit in this diligence is to always juxtapose our ideas, and those of others, against those of the authorities, and our own common sense, so as not to lose perspective in our search for the truth. The total truth is usually somewhere inbetween.
An optimist robs himself of the joy of being pleasantly surprised