Soundtracks to multiple episodes and the movies were released.
Including "Walkabout", actually.
http://sonic-images.com/Sub/SIR/b5/index.html
In retrospect, considering how the series tracked music, I wish there'd been a more traditional release with, maybe, a disc or two for each season. The way it ended up, first with two volumes of suites that contained music from the show (and, as often as not, music that was never actually used in the show, or hadn't been by that point) was weird, and then the episode-by-episode releases that just dropped the soundtrack for an individual episode. Those were better, but it was frustrating that it's one-track-per-act. Years ago, I knuckled down and made my project for a weekend or two getting out the liner notes and cutting each track into its constituent pieces of music, which makes for a much better (though initially very tedious) listening experience.
Hear that, soundtrack producers? Stop merging multiple tracks into one track. You're just hurting both of us!
Seems like a meager excuse to me. "The River of Souls" has two big guest stars and, as I remember, plenty of visual effects. None of this, of course, can account for the execution of the movie we got - and that execution is just dreadful.
JMS has said writing three complete seasons of television (less one episode) and also producing got himself to a state of exhaustion, to the point where if Crusade hadn't been canceled, he probably would've died at his desk. I didn't get the impression he was exaggerating for comic effect.
The trouble is, he's also very hands-on (he was just saying on twitter that he doesn't care for the modern teamwork-makes-the-dream-work writers'-room concept of making television and thinks it's better to just have one person write one script
(I was going to find the tweet I was remembering, but there are too many on the subject to be sure. This one is fairly representative)). There may also be an element of wanting to get straight to the "good parts" faster.
