Since there is so much more music that has yet to be released at all, I doubt the LaLa Land crew will devote more disc space to episode scores already found on Volume One. And truth be told, is there really that much more music remaining in "Hide & Q", "The Big Goodbye" and "Conspiracy" that is worthwhile on its own? "Hide & Q" has variations on the French National anthem, "The Big Goodbye" has some brief dramatic cues and "Conspiracy" simply has more of the creepy suspense cues already found on this volume.
I agree, though, that more Season One music from McCarthy should be included, such as the aforementioned episodes, "The Last Outpost" and "The Arsenal of Freedom". After that, I would add "Peak Performance", "The Hunted", "Half a Life" and "Genesis", plus Chattaway's "Power Play" and "Preemptive Strike".