> A second wave of issues would present an existential threat to Boeing, they are aware of this and you can be sure that every design element is being triple checked to make sure nothing at all is missed from the MCAS issue or anything else.

Sort of like how Samsung recalled the note 7 when it started catching fire? They did "extensive testing", claimed to have fixed the issue and then re-released it with a green battery icon in the header only to have them catch fire again?

No, I call bullshit. Companies aren't always as smart or as cautious as you give them credit for. Especially when they're bleeding money because of a recall. The pressures internally to patch and release are huge. If it's safer when it comes back it will be solely due to the FAA's work.