While most rationalists would happily and quickly plan [...], anecdotally many seem hesitant or even hostile to the idea of using fashion as a tool to achieve their objectives.
This point is essentially the point of having your article here on LW, but it is not emphasized strongly enough, in my opinion.
Additionally, I think the point that “the tool of fashion is one you are using to convey some information, whether you intend a message or not” is an essential point that I did not see in your text.
I like to watch movies and decide who is the smartest person, who is the most compassionate person, and who is the meanest person. And then ask myself: Why? Some mean behavior is actually an irrational self-protective response, for example.