[StanislavPetrov]

>I'm confused, what is the proposed framework supposed to fix, or how is it better? Is the goal really to reduce achievement gaps by limiting the advancement of top students?

Yes, that is the explicitly stated goal. Unfortunately a large number of ideologues believe that all people have the same inherent intelligence, and that disparities in outcome among children are due solely to racism and other forms of discrimination. That's the whole thrust of "equity". "Equity" means equal outcomes. It's proven too difficult for these people to bring up the performance of low achieving students, so they are left to bring down the performance of high achieving students and eliminate all objective metrics (like standardized testing) that can be used to assess student learning.