That is not even a sure thing. It is possible that Boeing is already producing parts for their proposed fix. If so, and the FAA accepts the request, B787's could be flying again within a couple of weeks of the approval.

Factually, all of us are clueless IMHO, including those who are technically competent to judge. This is now a FAA-JCAB decision for all practical purposes. JNTSB and US NTSB will certainly be fully prepared to second-guess anything with which they disagree.