Even aside from the technical merits (or possible lack thereof) regarding the interference, the FAA’s handling of their own published restrictions has been atrocious. They published airworthiness directives the week before the deadline, and they didn’t provide the clarification AMOC letters until less than 48 hours before the drop-dead. Then (because they rushed to get it done "in time) they were publishing revisions and corrections to their own material through the holiday weekend.
The management of the situation has been a far bigger disaster than the 5G signals.