Deja Vu is not a lost cause in my opinion. Two pressings worth seeking out are the R/R mastered by George Piros (fairly common) and the T/T mastered by Sam Feldman (tough to find). Both of these versions are later issues pressed at Specialty and sound excellent.
Is my CSNY De Ja Vu a bad pressing, or lost cause?
I hadn't listened to this in a while. Such great music, but my LP sounds like a diffuse, muffled mess. I'm usually able to listen through poor recordings to enjoy great music, but it was tough in this case. The CSN debut (couch) LP was never good, but not this bad. I wish these could sound as good as David Crosby's solo, If I can only remember my name. That LP sounds great.