Lost -Sorry, we're overlapping one another here.
It appears to me that many(but not all) subsequent reports added "loss of pressurization" on their own.
Yes, I think so.
I suspect when the ACARS messages are finally released in some form, there will be dozens of them trying to keep up with a degrading situation and therefore all within a very short period of time. The FWC's (flight warning computers for others) would be generating these until the power was no longer available. Such a point may or may not be a structural failure point - we just can't determine that yet.