It's still stange to me that killing 1 person means that a person goes to prison immediately, but after a manslaughter of hundreds of people the people who did it are still making decisions for the company and prison isn't even discussed.
I wouldn't put too much store in these emails. For every successful, safe product there is probably also an email somewhere complaining about how badly it is managed. What's needed is a specific link about the specific problem found in the parts of the system that actually caused crashes.
There's a reason why the relationship between FAA and Boeing got worse after these important details surfaced.