Thoughts from the future:
As you might expect, following my musings on setlists, there was a helpful post on the original forum, leading me to some typical lists from this tour, which seemed to prove that the album represents one complete show, in the order it was played that night.
Not sure what that does to my argument, if indeed I actually had one. Still, it's a remarkably clear and well-produced live album which I rarely listen to. I still haven't replaced my vinyl copy, which I loved back in the early eighties. Maybe I'll get round to it after I'm done reposting all of this.
One thing seems clear from the original posts - I do struggle to find ways to talk about songs for a second time, especially as Rush do tend to recreate the album versions pretty faithfully. It gets easier as we go on, I seem to recall.