Freret Neighbors United members reaffirmed their support of a plan to make input from neighborhood groups a more formal part of city government in a wide-ranging meeting Tuesday that also included: plans for reducing blight, uniting the Milan area, founding a health clinic, enhancing street lighting, planting more trees and throwing a Halloween Party for neighborhood children. Though the city’s proposed Citizen Participation Plan has been nearing its final form, several new concerns have arisen that threaten its adoption, Treasurer Jane Dimitry told the group of nearly 40 Freret and Milan residents gathered in the cafeteria Tuesday evening at Samuel J. Green Charter School. In the works for years but given a heightened urgency after Hurricane Katrina, the plan is intended to give neighborhood groups more voice in the city’s decisions and is modeled after successful programs in Portland and Birmingham — with one major exception, Dimitry said. “Sometimes the neighborhood represents its people very well, but in other cases, people felt closer to their church, the AARP, or other organizations,” Dimitry said of post-Katrina New Orleans. “We wanted to find ways to get other organizations plugged into the model …