What they started out with are a bunch of reel-to-reel tapes. Those tapes are not necessarily exactly what you hear in the finished episodes due to editing and overdubbing. They tried to get the pitch and speed to match the original episodes, but they did not try to recreate the way the music was occasionally mashed-up in the finished episodes. You can not listen to this set expecting to hear the music flow exactly like watching the episodes. It doesn't work that way. It is an archive of the original sessions, complete with outtakes and studio chatter like the bass player of Amok Time referring to his guitar strap as a "jock strap". It's a priceless historical record, something for the library of congress.
I don't really care about the language La-La Land used leading up to this set. I certainly feel, aside from a few typos in the liner-notes, that this is exactly what people wanted to get, which is an archival digital transcription of those master tapes.