Discussing a serious problem like property tax assessments would probably be of greater concern in June through August when people could file a grievance, than in December. The frequency and length of public meetings during a non-critical time can also effect membership involvement. Holding regular monthly meetings can really put pressure on the leadership to develop meaningful programs that will motivate participation. This is not an easy task. If the level of interesting programs drops, attendance will also.
Lengthy meetings can also be a major deterrent for attendance.
Meetings that drag on turn people off and can become the reason for dropping out. This is a reason why some people don't return for other meetings. A healthy neighborhood association required a diversified leadership base. Some of these things can be dealt with, while others cannot. The people who have been asked so far have not responded enthusiastically.