I think it's a bloody brilliant idea. I would have said so on 'that other forum', but doing so would have only upset a certain petulant person.
The kind of mesh I already have for my own experiment is ex-China (like most things these days) - and sold as Window Fly Screen. It's got a 2mm mesh size, which I can't see influencing the bees at all, and is only a few thou thick. I've tried tearing it, and I can't - so it's tough stuff.
I can see it being used with frames instead of foundation, and as a reinforcing substrate with Top Bars: no more collapsed combs; no more skewed combs, and should a comb come adrift due to rough handling - that mesh will act as a hinge, and keep the comb attached - so no more dropped combs producing clouds of miffed bees ...
Brilliant - simply brilliant - best idea I've heard yet (assuming the bees take to it, of course).