MWorth
I think that what was meant is that Boeing hopes to address any potential problems in the future thanks to the new BMU. I don't think anyone would say otherwise.
Well then I hope they can demonstrate the level of reliability needed to justify extending ETOPS operations. Problem is: After putting in a potential fix, it will take years of fleet experience to gather that statistical data by observation. The alternative would be to identify the root cause, fix it, do a new reliability analysis and start with a clean sheet of paper, so to speak. Even with this approach, the FAA would be wise to require some more operational experience to validate the analysis. But they would start from a new baseline.
Back when I worked there, we did a bit more than hope that our design would fly.