Having 3 AoA gauges would be better, but it’s easier install them in pairs on opposite sides. I don’t really see how two AoA gauges could be enough for ETOPS. Perhaps backup could be created from processed data from other types of gauges.
Turning off runaway trim has been needed as a skill since the 727.
Clearly, you do not understand what is happening.
The 737 Max noses down, the pilots correct with input. Seconds later, MCAS orders more nose down. This battle continues until the plane is put into such a dive by MCAS that it cannot recover.
You may ask....why not shut off MCAS?
Boeing did not tell pilots about it before the Lion Air crash.
Boeing did little notification after. Pilots complained and Boeing put out more information, but shutting off the MCAS was still not clear....especially when you are getting conflicting AoA readings, alerts and stick shaker.
The simulator with the old software was difficult to control for even seasoned pilots.