The mkv does have my fixed 1993 version as a 224 kbps AC3.
To clarify, there aren't many glitches I'm talking about. The sound quality pretty much craps out for a second when the Falcon attacks the Avenger; there's a jump-cut in the music at the beginning of the carbon freeze scene; and a few instances of clicking and clipping scattered throughout. All the laserdiscs I've heard contain these flaws, but the GOUT corrects the jump-cut and the Avenger flyby. The '95 Faces vhs may have also had these fixes, if I remember correctly. My correction of the Avenger scene sounds better than the GOUT, because I think they spliced it in from a different mix to cover it up, while I was able to use the Spectral Repair and the Decrackler tools in iZotope RX 3 to eliminate the distortion while keeping the rest of the sound intact. I was pretty amazed it worked as well as it did, though it took several tries to get it right.
I did have to do some restoration on the 35mm stereo track also. The main difficulty there was that the older laserdiscs were missing so many frames at reel changes compared to the GOUT, such that the cuts in the audio were quite noticeable. The flow of the music would be totally interrupted in these spots, if a music cue was playing over a reel change. To avoid loss of synch and to eliminate these annoyingly bad edits, I ended up patching segments of the 1993 mix into the 35mm to smooth over the gaps and allow it to play continuously throughout. These patches were meticulously matched in level and EQ, as well as having their stereo width narrowed by 12%, in order to seamlessly match the rest of the 35mm.
I also used some denoising at the very beginning and very end of the track, since these parts contained excessive hiss. Everything in between is largely untouched, except that mild limiting had to be employed to prevent the loudest parts of the track from clipping once the overall gain had been raised to match the 5.1 version. These edits are all carefully integrated and I very much doubt if anyone will be able to hear them (I certainly can't).
In terms of content, the 1980 and 1993 versions only occasionally differ, having come largely from the same 4-track source. The '93 is more dynamic overall (though the '80 isn't far behind, surprisingly), and has more bass, while the '80 has more emphasis in the midrange. Each has a different vibe, but both sound great in their own way.