Not sure what to make of this thread but an awful lot of separated thinking (as in not joined up) going on, as far as I can see, just for starters.
Horses for courses and all that. The combinations are not quite endless, but the permutations are numerous. Try it if you're not sure. Get a large sheet of paper, though, and choose all the options you can find from:
Solid floor, OMF, matchsticks, permeable quilt, box of sawdust, box of woodshavings, sheets of EPS in one of several thicknesses, (25, 50, 75, 100mm), average type crownboard with 2 porter bee escapes, CB with one feeder hole, CB with no orifices at all, glass CBs, Acrylic CBs, polycarbonate CBs, top ventilation through holes in CB, top ventilation around the CB, no top ventilation, polyurethane insulation, carpet tile insulation, newspaper insulation, no insulation, Kingspan (in various thicknesses) and a load of other alternatives, I am sure.
The right combination of insulation and ventilation will work and there are a lot of them. Some may approach an ideal and some may be adequate but falling short of ideal - some even are decidely less than ideal and may be a woeful choice for a set of given conditions.
Me? I try to emulate polyhives. They seem to work very well indeed for over-wintering.
Have fun.
RAB