Thanks for the shoutout.
Anyone who is really thinking outside the box of current democracy gets special accolades in my book. This article is definitely a deserving one.
Chapter 6 of my book provides a process of how to move from HERE to THERE. In brief, the TDG has enough credibility with the public to effect the necessary constitutional changes.
You might be interested in the "innovation" of the political scientists. Some of the caucuses you have described are similar to mini assemblies suggested by the experts. Here is my review of this work:
https://medium.com/tiered-democratic-governance/book-review-open-democracy-769049d93101
And yes, we should have people working full time on specific pieces of legislation.