A very interesting point you make about the use of weighted eyes to match the sink rate of the line.
Mikael Frodin, Hakan Norling, and other Scandinavians have successfully experimented with a similar idea: the use of tungsten coneheads of various weights on thin diameter plastic tubes. While they do not tie completely 'in the round' as you do, their patterns are nonetheless very 'full'; they make liberal use of Angel Hair, Flashabou Mirage, and Temple Dog Hair. The wings are often very long: anywhere from 3-6 inches, depending on flows.
Scandinavian rivers, particularly those on the west coast of Central and Northern Norway, may have more in common with West Coast steelhead rivers than they do with the salmon rivers of Eastern Canada. They emanate from similar surroundings and push similar levels of water (where's Per Stadigh?).
It is interesting to me that the most successful fishermen in Scandinavia and the Pacific North West seem to have come to very similar conclusions regarding weight in flies and shooting heads. The shooting head system reigns supreme in Scandinavia. While we continue to debate the merits of long lines vs. short lines, few would dispute the effectiveness of the shooting head system (and their variations) for Winter steelhead or anadromous sink-tip fishing in general.
I have fished the Skagit, Sauk, Stilly, and Sky on two occasions (I met you once at "Schoolhouse Pool," while fishing with "Don Risotto," a.k.a. Don Giuseppe Rossano). I seldom see a river with a push of water like the Skagit in April: she's big. The Restigouche in early June is very similar, but tapers off more quickly than does the Skagit (I have also seen the Skagit in September--still a big river). The largest river in Nova Scotia is the Margaree; after a good rain, the Margaree is about the size of the Kispiox (so I am told by friends who have fished both). I would imagine that the Kispiox is a small river as compared to the Skeena in September/October or the Skagit in April.
It is not surprising to me that different river systems with different rates of flow and different angling challenges result in separate angling solutions. What does surprise me, however, is the similarity of these conclusions across separate continents; they also appear to have been reached with relatively little cross-fertilization of ideas and techniques.
Or have they?