Starting "fresh" with a single leading implementer is really how it needs to be done.
Take San Francisco. There's the planning board, the planning department, environmental lawsuits, HOAs, abusing "historic landmarks" designations, political showmanship, developers, affordable housing, community meetings, unions, community groups (the cycling people are borderline militant) etc. etc.
All of those can bring any change to its knees. And they have, repeatedly. There are good parts of this process and people shouldn't not have input, but I might not oppose a dictator coming in for two years and just having at it.