Why only this retrogression?

I also own all editions of this unique work of art and actually thought that I arrived at the Remaster version from 2011 onwards my goal. When I found out now that this eimalige album and then as a multichannel SACD comes out, so of course I immediately slammed shut. When the SACD was there, they came in immediately and I was immersed in the world of Wish You Were Here. As for the mixing of the individual instruments, one has simply done right everything, say everything is wonderful spread around the listener, the effects surround a and play with the senses, but in terms of the sound, came the great disillusionment. I compared the SACD with the Remaster version of 2011 at the stereo. Why there must be such a deterioration here? The SACD sounds partly serh muffled, the bass is unclean and the cristal clear playback at mid and high frequencies, which can still be heard on the 2011 version, is here entirely missing.
I have the SACD of course brought me only because of the multi-channel sound, because I was already very satisfied with the 2011 version yes. As I have then listened to the SACD Stereo times in times in multi-channel, so I unfortunately had to find that the same tonal deficits is heard while multi-channel operation. Here also all sounds somewhat dull and many details which are out listen perfectly to the 2011 version, are barely perceptible here. The only thing that one can hit a little higher, the heart, of course, is the multi-channel sound, which leaves a over the sonic shortcomings overlooked something, but unfortunately I can only rate as follows:
Sound Stereo SACD: 2 stars (significantly worse than the 2011 Vesion)
Multichannel sound: 3-4 Stars (although good mixing of the individual instruments, the poor sound gets stuck)

Conclusion: 3 stars

Wish for the future: At least the same sound quality as on the 2011 remastered version as multichannel.

Addendum on 15:03:12:
After several auditioning must admit that the Mehrkanalabmischung has failed significantly better than the Zweikanalabmischung. Since it fetches almost only because of Mehrkanalabmischung, I have set high evaluation from three to four stars. While it still lacks some details compared to the 2011 version, but the division is so grandiose succeeded that the album is a strong buy recommendation!