There was a discussion about them somewhere else and the reactions are mixed. I am not sure but didn't MF wrote they are made from digital copy ? anyway, CR and Chesky had the masters (or the best close to it), CR bought and restored the old Ampex machines and wilkinson was hired to supervise the mastering with his written recording datas. In a way it was as close as possible (Chesky did something different in some of their cuts but that is a different story).
Tapes won't get better over the years, they will have drop outs and a loss of information, mainly in the higher frequencies. No matter what is done, it has to be different. An original is an original, the CR were the closest way to them and others are different. Isn't it great you can choose now between 180fr, 200gr., 200gr flat profile, 45 in 180gr,, 45 in 200gr, and some in white vinyl and now again those from AP..
Overall, that makes any LSC original quite cheap :-)
Original (and in a way CR) are unique, at that time the conductor and Artist did listen to the masterings and said "ok" or "not ok", in a way it is authentic. With the reissues everyone can create whatever he wants. Everything today does not get measured by any standard. Good is whatever one likes ...