Sergeant at Arms
The problem was that it was so strong that it broke the entire influence system. Council of Commons was a large part of the reason why AI kings could always override votes. It was a snowball of king has most settlements -> king has by far most notables -> king overrides votes to take fiefs -> king's settlement and notable count grow -> king has even easier time overriding future votes.
edit: I could easily see it being tweaked back up in the future (maybe 0.2 influence and 0.2 militia per notable?), but a hard nerf was definitely needed now.
^^^ Yup. I've recommended Council of Commons to many people asking for the best policy, but it being OP, cannot be denied. Even with just modest amount of fiefs, my daily inf. gain is like +85 per day. Inf. just becomes meaningless with this much.