Today seems to be, alternative insulation day. Very close to the system I use, for the most part. I am fond of 1-1/2"-2-1/2" planks in place of the 2x studs, as a difference. Rafters vs purlins can cause re arranging of the roof strapping. Wiring, again is a factor, my best solution so far is to wire it to the outside using conduit, within the strapping layer. I am assuming the 2x wall is for wiring purposes only?

Reading other post on other methods, I see a saving in time and material in using this method. Am I mistaken?

A nicely constructed soffit box under the overhang helps with deflection at the eve.