I totally understand where you are coming from. I feel like I should being doing more as the Senior NCO in the Brigade. I don't think I reach far enough to reach all the NCOs and believe we should have more NCOPDs.
However, like everyone has said I have benefited most from the small discussions not the big room/theater briefs. It seems to be more in a send mode and I receive less feedback from the broad briefs. I still think they are important for new policies and procedures but for professional developments I'll stick to small group discussions.