the awareness level is different between you reheating a prey item that you knew should be hotter but just got cold
I'm not sure I understand you. Why "should" the rodent be hotter? I never said that it should be. As long as there is no ice, I see no reason for it to be "warm".
Having said that, some snakes (usually Pythons) have a better feeding responce to 80F + prey items, in my experience. So i sometimes re-heat them. My point is, its a VERY useful husbandry trick that's in a great number of Python books, and is used by some of the top breeders in the world. Its nothing new, but at the same time, its definitely not a technique that deserves to be ridiculed.