The elephant outside the room
Shadow - Re E&E cabinet access.
Access to this cabinet and tripping the appropriate breakers (which would take some expertise) should be indicated by ACARS ceasing to transmit rather than tidily logging off. I agree with the security hole but before you have a world conspiracy to hide a security weakness, it would be sensible to show that all these comms just stopped as they would have with a CB being tripped or wires cut in the E&E bay.
Similarly, explain why the expert knowledgeable in all E&E bay comms CBs did not trip the SATCOM. One would have thought that all comms would have been disabled.
You would also need to explain why the crew carried on and leveled off and gave a relaxed good night call to Sebang on handoff - while 10 minutes before handoff there was already some miscreant in the E&E bay turning off the ACARS who somehow knew to wait to turn off the Transponder and VHF RT after handoff and only then. With of course unfussed FAs just preparing the meal as normal while this was going on and not alerting the cockpit.
It starts to get a little difficult logically.