Reporting for Current Campaign Members
Insight does have a Campaign Member count, but as you can see by the below definition it doesn't purely count how many people are currently within the campaign
The total contacts that entered campaigns included in the analysis. Campaign members could be contacts that were initially targeted by the campaign, or contacts that performed an inbound activity (for example, a contact that clicked through an email that was forwarded to them).
It would be great to be able to easily tell at any given time within Insight how many campaign members are in the campaign without having to go into the canvas and count each step.
This would make it easier when it comes to end of month reporting and providing quick snapshots to other team members.