I am cautiously excited about this. They claim these are new remasters and I thought the previous issues (from both DG and Esoteric) were very rough. So we'll see...

As far as I can see, symphonies 4-6 (Mravinsky) are "newly remastered" based on DSD tape transfers, which Emil Berliner Studios produced in 2012. So, the master tapes weren't touched again for this release. This is in perfect line with other TowerRecords releases, e.g. Bruckner/Jochum: only symphonies 1-7 actually are new tape transfers, for nos. 8 + 9 they used already existing DSD transfers that were previously released on SHM-SACD a few years ago.

At first glance, I was also a bit thrilled. After reading the whole description, I'm less so.

I am excited about the "fillers" conducted by Rozhestvensky, since I already own the previous remastering of the Mravinsky recordings by Emmil Berliners. I wish I could get the Francesca da Rimini separately.
Not sure I understand your concerns about these, the Pathétique is amongst my most cherished SACDs and every update of my equipment since then has allowed me to find new details I had not heard before. Since I've never been a fan of the fourth and even less of the fifth, I am less thrilled about them. I shall listen to them again soon.

Ok so...I got the new 2023 remasters. And it was a waste of money, sorry to say. (The Rozhdestvensky fillers may be worth it, but I'm only talking about the new remaster of Mravinsky's recordings.)

First I'm gonna say this: these are really poorly recorded to begin with. In fact, I'll take it a step further and make a perhaps controversial statement that Deutsche Grammophone had really third rate engineering back in the day. These are from 1960 and listening to Sony and Decca from the same year is like night and day. DG is, frankly, garbage. (Ok I'm mad having just listened to this, but I've side-eyed DG's old recordings for a long time now).

Anyway, now that's out of the way: I listened to the whole new Symphony 5 and it sounds shrill and thin, no bass, barely any middle. I then compared the first movement to the 2012 master and the Esoteric. And the 2012 master is actually better. And the Esoteric master is best of the three. Comparing first movement, about 5:30 to 7:00 when the music ramps up - and this new issue is all treble. It's almost painful. 2012 has a slight "tape hiss" (now completely removed), but at least it has, like, 15% more body. Esoteric is perhaps 25% more body. But I guess they're just putting lipstick on a pig. Either because the original recordings are so bad or because them not going back and re-digitizing the masters to save money (or whatever their reasons are; perhaps the master tapes are dust) did nothing to improve the previous issues; quite the opposite. I'd say for Mravinsky's sake - stick with the 2012 master or Esoteric. This is a huge disappointment. :-(