Back to Chorus Line for a moment:
It's just weird. There are some sections I found it had "settled in" for me and I wasn't too distracted by anything, and others in which people's or instruments' locations had moved or gotten bigger/smaller for no discernible reason. But even when things seemed fairly normal, I could walk into the next room and still hear this new (?) reverb-y layer.
My system is 7.1 so the rear speakers are literally in the corners of the room, and Zack is all the way back there -- but not really sounding distant (as Mama Rose would), so, kind of a mismatch. On the original, he "crosses" left to right and back again, and that's completely gone. BK has already referred to some of this, but it's just headshakingly bizarre.
BK also reminds us of Follies. Something this SACD has the power to do is remind us that both great and silly things are possible with remixing. There are so many more recordings that could be hugely improved, whether in stereo or multi-, that it's just sad this can't be moved along.