See - at times the pacing is what I quite like - I agree that there are other ways to get information across faster, but Carlin plays with the audio format to force you to dwell on certain things. It has some passages on the human cost / experience of war which are incredibly memorable imo. Of course no one source should be used in isolation and YMMV.
I'm with you. He does a great job of integrating sources, (with lots of quotes from the seminal works, in addition to memoirs and primary accounts) with a really cohesive arc to the story.
Nothing's ever made me feel the way the 2nd-3rd episodes of that show made me feel. There's something about the horrors of trench warfare being described in his way that really brings it home.