I think Duncan kept improving throughout the podcast, which is pretty normal if you've listened to many history podcasts. But sometime around the middle he definitely found a voice and settled on a way to present the material.

Revolutions sounds like the history of a topic more than several disparate and tangentially related histories. It seems like there should be some kind of general lesson to draw out of the study of a dozen revolutions beyond a recounting of the facts. Maybe there will be some kind of conclusion at the end, I hope so.

Duncan has spoken before that he has some novel overarching theories of history, I'd be interested to hear them in podcast form.

Check out The History of England By David Crowther next time you need a good history podcast. It starts pretty rough, you can basically throw out the first section on the Anglo Saxons as an inferior product but after he finds his feet it's one of my favorite history podcast of all time. I know he was thinking about redoing the Saxon episodes but I think he may have just done a history of the Saxons podcast seperatly later on to make up for his early product.