Why am I missing the point?
You say, that because Vozrojdeniy did not specifically mentioned animals and/or bacteria, there is no evidence of them being present, hence we need other explanation for the missing body parts of the decomposing for months in the wilderness bodies... Nice, what is your guess then?
I see no contradiction in my words. Ok, you may have rodents in your hotel room, but you can have bacteria everywhere. So it is absurd to eliminate their role in demaging and decomposition of the body, especially in the specific environment of the Pass.
Now, the process of decomposition and the cause of death are two separate things. Obviously, no specific relation was stated. They died because of their traumas, and they decay, because that is what happens when we die. That is probably way too obvious for a coroner, so no need to explain how and why they rot.
Dont get me wrong, but I think you are missing the point, while trying to exclude all reasonable facts, and looking for a sensational cause.