Dear god no. The proposed cap is on 10k students, which is roughly the size of one high school with its feeder schools (we're talking about breaking up large school districts, so individual schools are going to be on the larger side). That's not something on the level of "this is going to create inefficiencies" so much as "this is going to utterly destroy things."

The problem with hyperlocalism is that, since the number of constituents is so small, one angry person with a megaphone can throw a race, letting them act as a petty dictator. There's already too many petty wannabe dictators running around school board meetings right now, and encouraging more isn't going to help things. Of course, I assume this is entirely the point, which makes me wonder what the author's failed crusade against his large school district was about. Transgender bathrooms? Critical race theory? Litter boxes? Teaching evolution?

(Also, I take issue with the characterization that the largest school districts tend to be the lowest-performing--my experience, looking at the list of largest school districts, is that they tend to be, well, average.)