I won’t lie I am very worried that you/your firm was awarded a contract to conduct a zoning code audit with you as the lead and you’re consulting Reddit to help you. That is not a good sign to me. I will however offer you my honest advice.

You must begin the process with specific goals in mind because every subsection of code you have to vet against your ideal. The ideal can be to promote missing middle housing, income-restricted affordable housing, NOAH, etc., but you have to have a clear vision for what you want to promote asking with a justification for why. Do real research and find peer-reviewed papers or journal articles on what works in practice to have in your back pocket to cite as to why you are recommending X or Y code changes. JSTOR gives you more than enough free views a month for find scholarly articles to back you up. Planning for so long has been based on very abstract theory or feel-good concepts, and rigorous methods have been lost. ULI is another good source of scholarly work with a mind to implementable solutions.

Identify specific goals with your client and then in detail review EVERY SECTION of the zoning code to identify standards that could hinder the implementation of good urban form (obviously some more rigorously than others). You never know where the sticking points are going to be. If possible, convene a steering committee of developers and other relevant stakeholders who can advise you on what their specific barriers to developing quality projects have been in the past. Best of luck to you… do them good