BOAC,
if only we could be sure we have ALL the ACARS messages in sight,
There is absolutely NO way of confirming that, apart from the declarations from the BEA and AF.
Secondly, these messages concern ONLY the ACARS sent to the maintenance department.
Missing are all those transmitted to OPS /CDG station / GIG plus all the routine queries for en-route alternate weather, routine messages to base, the automated initiation message, flight plan, loadsheet, the OUT and OFF....
then there is a very good chance we can rule out a high-level break-up in view of the lack of an "EXCESS CABIN ALT" warning as you say.
I don't think so. Look, these messages are just the picture until 0214Z. What happened next is pure speculation. Is the last message the very last transmitted ? Was there a power failure after the last transmission.?...Conjectures...