sir82 and Simon have called this 100% correct.
Announcements have to be made so there is a clear party line to push cynical and critical comments underground.
In the main however, no one mentally in will care. Everything is a blessing, everything is an evidence of the chariot going at warp factor 10 even if it's a direct contradiction of a previous announcement.
The good news is that when people do start asking questions, the double speak is highly visible. The audit trail of what the organisation has said in the publications has been well documented for some time (e.g. jwfacts). The move to distributing BoE letters and other internal documents electronically has opened up more about processes and procedures to scrutiny. Most recently, the visibility of the GB and their need to respond more rapidly to community chatter means that there is no longer a simple wall of silence (AKA "waiting on Jehovah") where the org felt no desire to say anything.
So, letters like this mean very little to most dubs in terms of their cognitive dissonance. To those waking up however, they are yet more pieces in the jigsaw of WTS propaganda.