Dick Smith said:
As an example, a pilot may need to request a diversion around a Cb at the last moment, but the controller is not at the console, so the remaining person has to say, “Standby.” This could result in the difference between a safe flight and an aircraft being torn apart in turbulence.
If I found myself in that situation, I would quickly come to the conclusion that penetration of the CB represents a much greater risk to the aircraft than an un-authorised deviation from the planned track.
I would remain on track as long possible. I would then turn the aircraft to pass around the weather and follow it up with a "PAN PAN" call.
Please don't tell me there are Pilots in Command out there that would choose to fly through a CB and risk "being torn apart in turbulence" never mind the possible hail, lightning, and severe icing!!
