By chance I came across this discogs review of Sunday Mornin' by Jenell Kesler(?), which somewhat parallels the original post of this thread.
"Norman Weinstein said of the record, “Green had the misfortune of being saddled by his record company with painfully stupid concept albums that may have contributed to his depression and drug abuse. Imagine if Impulse Records had asked Archie Shepp to do a country and western collection or a cliche-laden gospel set? Green suffered these indignities and more. Sunday Mornin' suggests just how consistently great he would have been if Blue Note had permitted him to do no-nonsense, mainstream jazz sessions.” As to this comment, I can see both sides, yet we all don’t become drug addicted because of our jobs, and Green could have easily refused to lay down these tracks, and no, I don’t think this Sunday Mornin’ is a shining hour for Grant Green."
There's more at the link. I have no idea if this critique is accurate at all.