This study is rich with propaganda. Thanks for the "between the lines" commentary.
There were a few gems, like how you compared the current WT "Jehovah is the author of Salvation" to CT Russell's "Jesus Christ is the author of salvation". What a find !! I was often confused at meetings when the study material seemed to interchange references to Jehovah and Jesus quite freely, as if when you said one you could mean the other one.
I enjoyed that quote from the past article that said Jehovah would likely spread the "kingdom message" to China and other such areas by ways we haven't yet imagined. They couldn't have envisioned (in 1965) spiritual food being spread by computer, could they? I think the Internet is spreading information to cities in China and Muslim nations faster than the JW's will ever be able to do.
Finally, that part about "all Christians sharing in the preaching" really is so wrong. As you point out, that's their way of inflicting guilt trips on their rank-and-file. Didn't Paul say that there would be differing gifts among the congregations, rather than all doing the same type of thing?
Of course, the Bible can be twisted any old way people want to twist it, and the Watchtower (in articles like this) vividly displays their twisted way of thinking!