Your essay pretty much covers the significant issues as far as I'm concerned. I also own both a 13oz and 16oz 8 yard kilts. I find that both perform almost equally well but I find that I prefer the 13oz under most circumstances and for reasons of comfort. I believe that the bristley surface of the wool is what allows the pleated layers to move so well and provide that characteristic swing. The movement of softer fabrics are adequate but you can't beat worsted wool for swing action.