The question of whether the CVR recording demonstrates good communication is something of a red herring. As the article and NTSB report make clear, the crew dev

The question of whether the CVR recording demonstrates good communication is something of a red herring. As the article and NTSB report make clear, the crew deviated significantly from the correct procedure, which should have led to the unambiguous identification of the working engine. While the crew were not arguing, cockpit discipline had still broken down, with the result that the pilots talked themselves into believing that they had a double engine failure. The deviations started with the captain struggling with an overloaded radio channel, which should have been cut short by squawking 7700. Th article notes that the controller was a woman. Was that an issue in what followed? It’s a possibly-relevant factor that we will never get a certain answer to. No one is assuming that pilots will always operate at 100% capacity, which is one of the reasons for having procedures intended to catch common errors.