K3S against K3 reviews?

OK so the K3S has been out now for several months but only 5 reviews on eham. This is worrying as I am beginning to suspect that a 4 layer rf board which sandwiches noisy data links to lower the noise floor only shows a noise improvement in lab conditions. Attach on a big antenna and the atmospheric noise just swamps any gain made by trick board layout. I wonder if the designers have over engineered an already great product based on theory and lab based results. I respect the effort from a technical standpoint but wonder how much this will gain the user in the practical world. This may explain the lack of comparitive reviews between the K3 and the K3S. I will admit that if I parted with £2000+ on an unnecessary replacement to my K3, I may choose not to advertise it.