Cool graphics. Interesting stuff.
You might want to add to your research that the history of industry self-censorship of comics began in 1948 with the adoption of the ACMP Publisher's Code. It basically was the template for the CMAA's Comic Code Authoity started in 1954.
Of course, there are a lot of instances of publishers "self-censoring" or, more accurately stated, using their editorial perogative in response to public complaint. A notable example is Fawcett's discontinuance of the use of the racist character "Steamboat" in response to complaints by the NAACP. So not all "self-censorship" was bad.
One other point: You assert that "We all know the result of the CCA, which was (IMO) more than a decade of lame product with art and writing to match." I would not characterize the comics produced from 1954 to 1964 in that fashion. First, vast swaths of comic titles were largely unaffected by adoption of the CCA. You may not like Barks' Ducks, but many of us do. Second, while I won't dispute that the CCA had a profround negative effect on horror and crime comics, leading to the demise of many titles and even publishers (most notably EC), it also probably should be credited for helping to spur the re-birth of popularity for superhero comics (most notably Marvel).