Wow this is really something
In recent years, the spiritual instruction provided by Jehovah’s organization has reflected an increased emphasis on simplicity and clarity.
This statement really reminds me of moses taking credit for producing water from a rock - the act that got him barred from entering the promised land. They're giving credit to "Jehovah's organization" for the spiritual instruction, not to jehovah himself. Which brings me to:
Third, there are the recent refinements in our understanding, such as the clarified understanding of “the faithful and discreet slave.
They started out by taking credit for everything, and giving none to god. So are they implicitly admitting that the "recent refinements" in doctrine are from men and not from god? Are they saying that they've changed doctrine so that people can understand it better? Who would consider this a good thing? This is like a physics professor teaching his students laws of physics that are not accurate but easier to understand - they may be able to learn them more easily, maybe more people will get physics degrees but the knowledge will be completely useless! If they're claiming that the doctrinal changes were intended to make things simpler, then they're admitting that they're teaching false doctrine.
The doctrine is from men, and they know it's not even true - it's just convenient for them because it makes it easier to indoctrinate people into their cult.