Hi,
I'm not sure if what I say is quite right, but in my estimation, the Acid Mothers Temple group made their fame on live shows, not in albums, and it shows in their work, and when they meet up with others (Mani and Gong as an example), that their best is improvised and sometimes different than what a regular album might expect.
My thoughts are that some of the earlier albums were designed to sound like a lot of their live performances which are an energy draining experience at the end, for many of us, but exciting to see that done so well, even though it is pretty obvious that they are very relaxed and able to improvise at the drop of a needle!
However, I would agree, that in the past 20 years, not having some quality on the recordings and pressings, is not exactly a great thing, but I tend to think that finances around their work were not quite the best and it made for very difficult recordings. Today, however, since everyone can have a piece of mastering software on their computers at home, and then even take it some place to make it better, this is far less expensive of an undertaking than it was 20 years ago.
I kinda look at it as if I were listening to a bootleg ... it's about the show and its energy and quality, and the recording may not do it justice, but the energy behind it ... can leave you breathless for some time! Picking on the quality of the "recording", sometimes, only shows me what waste some famous bands lay in terms of money in these things ... and they don't need it! I don't mind a big name these days, but the over produced thing after the recordings is so much what the band itself is not, even in concert, that I tend to stop listening to that particular band. This has not happened to me with AMT and their work. It still feels fresh more often than not, though some of us might get really tired of the "thrashing", but honestly? I prefer it to many "metal" things that are almost aimless in the thrashing.