Would they reveal it if it was Boeing's fault? or is it more likely to be covered up with a fix without being announced?
In 99% it is combinations of factors and never single culprit unless it's a manufacturer/part fault causing the crash. Very rarely we see design flaws that would cause a big Boeing or Airbus to go down. It's always combination of lack of training, maintenance, issue with design, pilot error or mishandling the situation and so on.
Probably we have to single out maintenance flaw as it was a brand new airplane. It's either component (sensor or something else) gone bust, lack of training of the crew or them mishandling the situation. Every component on an airplane is backed up by two other separate systems in a way that even with a faulty sensor the crew would be able to land safely.
We won't have an official version in few months time that's for sure, especially when you look at the crash site and how the plane disintegrated on impact.
We can only speculate but coming from this:
https://theaircurrent.com/aviation-...bulletin-on-aoa-warning-after-lion-air-crash/
and the flightradar24 data showing high alterations in altitude levels, goes to show the pilot was struggling with the plane(perhaps in manual mode).
If by any means those two end up related it would be a huge blow for Boeing no doubt.