One sidebar improvement would be to have the funnel dropdown (indented), under the campaign you have selected. This way, it is more clear that the funnel exists within that specific campaign, and you can easily navigate to the various stages, all under the same campaign hood.
Add the ability to have a sort that would be similar to a feed showing the ideas with the most recent activity first. This way ideas that were commented on or voted on would pop to the top of the list.
As a community member I have never felt any usability to see the moderator list in sidebar. A member can just click on the name of the moderator and can see what a moderator did. Is it necessary for a member to see the information of a moderator?
Allow for the Monthly Leaderboard to be displayed in the Sidebar (where the Historical Leaderboard is currently), so the most active, current participants see their names on the Front Page. This would help encourage continued participation, especially for new community members who would take years to get to top 10 of the Historical Leaderboard.