Exactly.
That was the best question, the most appropriate one could ask when faced with this! If there are recordings, what's the point in keeping them out of reach of fans? If this material were given to some people here on this forum (I include myself in this list), I guarantee that with a small investment, we would be able to do a good job of producing this recording and giving it the treatment it has always deserved, even if the cost were paid for by everyone involved.
And you could finish an unfinished Picasso at the same time. Really, I've seen some crazy stuff on this forum and this line of argument takes the biscuit.
The people who work on video and audio production have decades of experience. Anyone who gets to work on a product by a major artist like Dire Straits has years of experience at the highest level and a track record of delivering outstanding work. And you think Mark and John are going to release raw content for you to finish?



For the record - I wouldn't put MYSELF in that frame, let alone an amateur fan.
Jokes aside, fans often do a far better job than official parties. Take a look at the gaming industry, where releases by big corporations are often complete trash that then gets improved by fans, sometimes single-handedly. A good example from recent history: Grand Theft Auto: The Trilogy – The Definitive Edition. From 1998 Trespasser to this day, the gaming industry is constantly being improved by fans and their mods. Heck, even "Counter-Strike" originally was a mod. Don't underestimate the power of fans.
Personally, I lost any confidence in anything "official" as the quality of the product is often mediocre, so if it's official it doesn't automatically mean quality. Not to say live videos are bad though as USUALLY they are done great. What Brunno meant was, I think, is should these "raw" tracks be available somehow, official or not, fans could (and they would) combine raw tracks and audio into something pretty good. As an editor myself, I can say editing is not rocket science, and it would be fun to mess with OES tracks.