If there is indeed a vinyl version of All Things that is "remastered for vinyl from the original analogue stereo master tapes" then I can tell you that you likely are indeed in for a special treat - especially if all you’ve heard is that pressing I had.
But, I’m trying to rack my brain, now that I think about it, as to if there was any original release that sounded fine (perhaps originally??) and was then prematurely replaced by the horrible sounding one I and everyone else I knew experienced, but that was all too long ago for me now to know whether there really was indeed a rumor based on fact or if my memory is now playing tricks on me (seems like I’m getting old just thinking about it). But, in any case, I still have at least a hunch that a newer remastered version may well be worth your time and expense to seek out.
Good luck in your search.