Eccellent article. Thanks for sharing your thoughts. I think I would basically agree. I find it very hard to calculate the share of branded search for our websites among organic search traffic with the tools in the market: Google AdWords Tool / Search Console, … How would you do it? Which is the best tool to figure that out?
Where did you get long term brand search volume from? Google Trends? And do you see a correlation between Branded Searches performed (via Google Trends or KeyWord Planner) and the actual Branded Organic Search Traffic (Google Analytics / Console)?