Yes you could utilize the Event Viewer for this and turn on its scopes under the Window menu. This would work best if you were grading within the Multicam clip, otherwise the Event Viewer won't reflect your work. But for your situation it seems like this will work fine.
Thanks for that - the event viewer works great. No need for scopes though - I bought Hawaii Automatch, and I'm blown away by how good it is at matching footage from different sources. I'm sure it's all achievable using the built-in colour controls, but what a time saver!