Gary -- I think we differ on what it would have meant for AE to "understand the criticality" of RDF and two way radio. Yeah, she included it in an earlier plan, but when that didn't work out, she went ahead anyhow, which to me means she either didn't understand the consequences, was unable to rationally calculate the risks, or was nearly suicidal in her tolerance for risk.
If the plan had included something like, "Checkpoint: 1 hour into the flight. If 2-way radio communications and RDF are not verified OK, then turn back." then the broken belly antenna wire would have been an inconvenience and not a tragedy.