This is more an observation rather than a suggestion - When creating a new campaign I was not expecting to need to first add a funnel elsewhere. I was expecting to create the funnel as part of the workflow of creating that campaign.
After creating the new funnel elsewhere I launched the campaign and submitted a new idea to it but forgot to assign the newly created funnel to the campaign.
That being said, the concept of funnels itself is terrific. Thanks again for the opportunity to test-drive this new functionality.