I'd just say this, Capt:
"Can someone explain to me what sort of aircraft malfunction would cause a TRE, and with many years in MAS and on the 777, and the 777 systems, to react in this manner? Because I cannot." That's the point of this mystery and of this discussion, isn't it? No-one can explain it... we can only enjoy reading the suggestions around possibility from those who can knowledgeably opine on what we know. Nixon doesn't seek (as I perceive it) to explain any of these things either. Just to suggest what he thinks are practical possibilities. Others can then judge these hypotheses (or you can, like Lead Balloon and Pinky, just waste bandwidth).
"There is no indication in any of the recovered MH370 wreckage that a fire was involved." Perhaps not, but did any of the recovered wreckage come from any portion of the a/c that may have been subject to fire (e.g. the avionics bay or cargo hold)?