IMO, the 737MAX is a good airplane, but still has to prove herself through the battery of cert. text.
You mean the same certification stuff they held onto from about 1967??
That's before the moon landing!
All they're testing is that the engines won't blow up and that the new electrics won't catch on fire.
Everything else is pretty well been tested to death over the last 45 years. Remember this is the same type certificate from the 60's!