I will wait for the official report. MCAS is clearly an unintuitive and potentially lethal system when triggered by faulty AoA data. I'm not going to blame Boeing, the FAA, the pilots or airlines until we know the exact failure modes triggered in these two accidents.
I am not a pilot, and probably being adversarial, but the question that might be asked is: Will waiting for the grounding to be lifted be enough, or the FAA oversight review, or until either or both of the accident reports, which ever comes later?
The FDR readouts provide a lot of information, but the state of the AOA sensor, cutoff switches, and flight computers is impossible to determine after the crashes. We may never know the the full answers, given the complex fault tree. Could this saga take years, like the Comet metal fatigue investigation?