I somehow agree.Both are great albums and with less production everyone would pay more attention to those awesome melodies he was composing along with amazing lyrics.I don't like the Rock And Roll album much, though.
There are alternate studio takes and demos of a lot of Mind Games / Walls and Bridges material on The Lennon Anthology and scattered throughout The Lost Lennon Tapes radio series. The quality really varies, but on the whole these are often the best available versions of these songs, in my opinion. What John never got a grip on in the early seventies was how to produce his songs: compare his efforts to Paul's, for example.
That's what I feel when I listen to Plastic Ono Band:the production is its weakest point.But he did not improve much by 1980 (Double Fantasy).The outtake of Nobody Loves You When You're Down And Out included on Menlove Avenue is better than the release version.
I predict this to be tight between Imagine and POB. Vote....