Occam's razor would seem to suggest that Corrie jumping in a bin of his own accord, getting picked up in that 4.20 collection and he and his phone going to BM in the bin lorry would answer most of the 'problems' with this case. It explains exactly why Corrie wasn't seen after that last cctv.
What I don't understand is that collection was supposed to be recycling weighing 11kg.
Thinking more on the landfill site, anything co-located with a body could give clues. If there's a body co-located with a ton of cardboard boxes and wrappers with Greggs written on them, then Corrie was in that bin and instead of being sorted through as recycling, somehow it went to the landfill. But if a body is co-located with household rubbish, then that would suggest something else entirely? Or if a body is wrapped in bin liners or something, then that suggests someone else was involved.
It's going to be a very long and difficult wait for Corrie's family
I don't get a feel for mugging and murder by chance in that timeframe, with the amount of people still around. If it was, it was made to look like a mugging and planned, and very organised. If this is the case, LE will know from the CCTV who was checking on him in the doorway, and looking to pick up suspects in the area. I wonder if he could be seen in the doorway from somewhere else and could he have been set up? Also if he was called over to HS I think it was by someone he knew.
So for me your Occam's razor also ties in with him looking around, entering the HS area, just waking up, early hypothermia, effects of alcohol, clothing worn, no jacket etc, at that time of night, temp drop. I mentioned earlier today and as redgoblin has above. This would mean the bin wasn't weighed, error, or not recycled, and went to landfill IMO.
The other, is that something happened in a building, house in the vicinity, and as you say the materials around him, if he is there, will tell whether foul play, or misadventure, or put there by other means. He could also have been put in a general waste bin elsewhere, next bin area.
The info on the phone pings may not have been accurate, with gaps, in what we were given.
It will be interesting to see what information the Police have for this search or is there a set timescale after which they agreed to release back the landfill, or as part of their reviews on the case, it was now or never time, to search it. IMO