The other day the newspaper ran an article about the state of the boars and commissions at the city. I'm too lazy to go look for the article, but I can sum it better than they can. Boards and commissions with teeth were generally full and active. All the rest lacked members and meetings.
It should be obvious, but I'll go into it very quickly.
Most of the boards are "advisory boards." That means they meet, talk about stuff and tell council what they think. Council can do whatever they want with the advice. Most of the time they ignore it unless it backs their legislative goal. As a member of this board you get a little tired of not having your advice taken so you stop showing up. And that's usually the end.
Some have complained that certain advisory boards become a personal stone throwing contest for the chair or members. These people get appointed and make it their job to either harass elected officials or city staff. This turns off other volunteers and they stop showing up thus no quorum made be had as a "screw you" to the bomb throwers.
My mother has served on many boards and commissions over the years and she has some good stories about how members sometimes need to have their roles and powers explained to them. Some folks think they are literally writing the law and are upset when their actual powers are really just a suggestion that council may, or may not, ignore.
I would not give these boards more power in order to attract more people and hold more meetings. Community input is easy to get if you ask for it. Giving unelected, unpaid citizens the power of staff or council is a bad idea. They need to get rid of some and take others and combine them into one volunteer board that can take on a few different subjects in each meeting.