The most critical transit issues are at the scale of the Bay area, and the SF mayor doesn't have the authority or budgets to solve them alone. That will require strong action at the state level, or the emergence of a new layer of government with the mandate and budgets to bypass the petty squabbles of cities and impose a sane bay area transit infrastructure development roadmap. One can dream...
Controlling what people can and can't build on their property at the city level was created to prevent the same problems that exist on the city level back when they were on the neighborhood level.
I don't see state or county level zoning as anything more than recursion that will just keep bringing the problem to a different level without solving it.
The fundamental issue is that people are not allowed to or the regulations make it economically impossible to build housing at high density.
I don't think adding another layer of bureaucracy will make it easier to build the necessary density of housing.
London Breed is trying to make San Francisco a city for everyone, and she does not let personal feelings get in the way of good policy.
Jane Kim may know how to say the right things, but get on her bad side and she will abandon your policy and destroy your company’s projects.