Post 4 - I understand your question, and I only have limited snow experience re trekking, but I'll have a stab at an answer. Hopefully others will be along as well on this.
In Oct 2005, we had about a metre (3 feet) of snow from Manang upwards. In places the snow had been shovelled off roof tops (as the weight could well cause roofs to collapse), so in some narrow passages it was very deep - I actually struggled quite a bit in places just to get out of Manang when we finally re-started trekking (though the 5 nights there were actually great fun - it was very social, lots of chatting, jokes, laughter, drinking, rumours (some very silly...) - most trekkers then were indy trekkers, due to the Maoist insurgency and the advice not to go trekking, but I digress).
Basically we walked in a narrow grove much of the way from Manang up to about the low camp at Thorung Phedi. Sometimes this was almost waist deep, other times just above the ankles. From the Thorung Phedi high camp, where we stopped for a cup of tea on our crossing day (we stayed at the low camp), until about 1 hour from the top of the pass, from re-looking at my photos, the snow was little different from when I did AC in Dec 2012 - ie about 2-3 inches deep on the trail, no doubt much deeper off the trail. However we were the last people over the pass that day, and got near the top about 12-1pm - for the last hour we were walking into the wind that builds up in the valley below (to the west) - the wind whipped up spin drift and basically filled the grove in the trail, which by then was about waist deep. This last hour to the top was extremely hard going - I was basically breaking trail thru the snow, and I was getting very cold (despite carrying about 17 kilos back then). We stopped at the tea hut at the top of the pass, did not take any photos at the top (it was too cold and there was a lot of snow blowing around - I was shivering), then after putting some more clothes on, we headed down - after 30-40 minutes we were out of the wind and everything got much, much easier.
As well as the very social atmosphere at Manang, the contrast of the pristine white snow against the incredibly blue skies from Manang to about 1 hour from the top of TL made for some amazing, fantastic views and photos, so the snow had its compensations. I did not hear about people crossing days later having any real problems - in my experience bad weather lasts only 2-3 days in Oct - Jan, so that is why it is fairly easy to wait it out (and much, much safer to do this).
In Oct 2013, Phailin dumped about 600mm (2 feet) of snow across much of the Everest region. Someone who did the 3 High Passes in Dec 2013 sent me some astonishing photos of hard, projecting ice on the west side of Cho La (a steep, high pass) - it seems it was the Phailin snow that had been formed into weirdly shaped, hard ice. It was totally different from anything I saw when I did the 3HPs in Jan 2010 and Dec 2010 - Jan 2011, when there was very little ice on the sides of the high passes - there is always thick, hard ice on the top of Cho La.
As above, see what others say, but conditions may be very localised. I am still planning to do the 3HPs again this Dec - Jan.