The Menlo Park City Council is poised to approve zoning changes to the portion of the general plan governing the city’s M-2 area, east of U.S. 101, when it meets on Nov. 29. If the update is approved, the action will conclude a two-year process that included dozens of community meetings and deliberation by city advisory committees and commissions, as well as the council. But a bit more time is needed to improve the 30-year plan.