grislybutter
just a couple of points of interest,
a lot of 70s rock albums were great compositions, but with the exception of a few labels (Eg, 1st pressing Columbia's, some DECA's, Deutsche Grammophon) the actual recordings, and the quality of the vinyl being used by the other labels was crapola. Your A3.2 may be a revealing piece of audio gear, and brutal when exposing sh%$ recordings your 2252B didn't divulge.
As for analog VS digital sources, I have two sets of reference speakers, a pair of 946 Focal Electra's and a pair of Meadowlark Heron hot rod's. To save space, lets just say both the analog & digital sources are snob set-ups with the hat tipping to the analog source. The Meadowlark's sound better on my digital source, and it has a tube pre-amp section. I don't know why, but I'm ascertaining the Meadowlark's were voiced using digital gear.
In your case (don't take this personally) the A3.2 is pretty well engineered, it may be revealing that your cd player is not of the quality you thought it was.
My last point is ..... some gear just doesn't go with some gear. On top of that, perhaps your ears just don't dig Musical Fidelites sonic signature, and the A3.2 isn't your cup of tea???
I'm just saying.