"There seems less need to store pollen as insulation on the two outside combs and a strong desire to use those outside faces of the combs for brood. In effect there is a net gain of some four comb sides for mainly brood reading which is a substantial increase in the over all brood area. In a national that would equate to 18% and in Langstroth : 20%"
That does not equate to No pollen. Naturally there is some pollen storage which is the natural situation.
Not having worked 14 x 12 I am not familiar with the numbers connected to them and would expect anyone interested in that hive to do some research.
I feed fondant to my hives, and give a lump of some 8kilos inside an empty super so cannot say whether a national poly would over winter with a prolific strain just on a National
I can say that a poly Lang over winters very well with an AMM strain.
Not possibly all the answer you were looking for but I won't tell you lies.
PH