The truth of the matter is that CBS Paramount is really inconsistent in this area. Look at "Mannix," season 1. Musical performances by both The Buffalo Springfield and Neil Diamond were left intact. Some music performances are cleared for "Happy Days," others are not. To me, that's what is...
I expect that season 2, volume 2 will be released along the lines of the reissued season 2, volume 1, i.e., there's likely to be a little of the Heyes/Komie/Winans score remaining for those cues for which CBS Paramount couldn't clear rights. If that's the case, expect to see them in the credits...
I'm inclined to agree with you especially as the CBS Paramount Syndication Bible indicates that only the first two seasons have been transferred to HD (though the page for "The Fugitive" hasn't been updated since March of last year). But the money has apparently been spent on the remastering and...