IDK about you, but to me rewarding long-term landholders is basically feudalism and doesn't count as "innovative." It's the same shit we've had for thousands of years, but because it's CA, they have to PRETEND it's progressive.
The supporters are explicitly non-partisan:
https://www.hjta.org/about-hjta/paccommittees/
The main issue is that while they were setting this up, they also arranged for a 66% voter threshold for renewing things like school funding.
Most districts around here are only 60-66% progressive, which means the schools are chronically underfunded (funding is 47th in the nation, despite California being one of the richest states).