My understanding is Nathan wants to run 8 frames in a 10 frame box by decreasing the inside dimensions of the 10 frame box to that of an 8 frame box and keep normal frame spacing. Not increase frame spacing to fill a 10-frame box with 8 frames.
My opinion with standard langstroth is 10 in the brood box is best. You get more brood space, and there is no advantage of overdrawing comb in the brood area as there is in honey supers. Ya you might kill a few more bees with you aren't careful, but it pales in comparison with the added brood you get. I run 10 in the brood and 9 in the supers. Now if standardizing is important and you don't want to mess with have some ten and some 9, then going all 9 is not a catastrophe. I have some with 9 in the brood area just because that was the equipment I had with me at the time. I do notice much more burr comb and propolizing when they only have 9 though.
I have never used 8 frame boxes, but can see the possible advantages that Nathan is considering.