Just listened to the Adonais score, finally. I'm disappointed with how little new music there is. The first ~2/3 of the score is mostly a rehash of Corbomite and Charlie X (and maybe some other stuff), with just a little Apollo fanfare added.
The last ~1/3 of the score is pretty good. But I had high expectations for the whole thing, so I'm disappointed. It is, I suppose, a very professional job, making effective use of previous material. But for listening, most of this episode might as well have been tracked.