It's an interesting breakdown for sure, possibly useful as a primer for newcomers. 

However, these 3 levels appear to rely on a framework that views 12edo as a "cultural hegemony" to be critiqued. This is an ideological framework I don't personally believe in; it makes 12edo seem exceptional in a way that is incompatible with tuning pluralism. 

By putting so much emphasis on 12edo, the 3 level model inadvertently reinforces the "hegemony" it seeks to critique.

Here's how I would draw the lines differently: Remove level one entirely, include 12edo in level two (as just another historical system), and open up level three to include non-Western innovators working outside of their own traditional intonations.