I have just one point. You are labeling some people as "constructionist". I had to look it up as I am not a student of classical forms of philosophy. Thanks by the way. Its nice to learn a little.
From what I can tell a constructionist view is built around the idea that there is a self that constructs. No self=No constructionist view. Apparently the constructionist view is a response to the "Objectivist" view but this also requires a self. No self= No objectivist view.
Thinking is fun.
Learning is fun.
Time to Meditate.
"Beautifully taught is the Lord's Dhamma, immediately apparent, timeless, of the nature of a personal invitation, progressive, to be attained by the wise, each for himself." Anguttara Nikaya V.332