Here's the rub of all their "Old Light" vs "New Light"
Where in the Bible did YHWH ever mislead anyone with wrong information? Show me where he gave out misleading information, because his worshippers simply couldn't handle it. Quite the contrary, he many times gave prophecies or Laws that the Israelites wouldn't understand for many thousands of years, or restrictions in the Mosaic Law that protected their health, even though His people had no knowledge of germs and how diseases are passed along, or why eating the flesh of a certain animal was considered unclean. Only, today, with scientific advances do we understand those statements and how important they were.
Yet the WTS always blames God for any misinformation, saying "The Light has gotten brighter". So if that is true, explain how the WTS can reverse themselves on certain subjects if God were revealing his eternal, unchangeable truth to the Governing Body and the Writing Staff all along? To me this smacks of Adam's attempt to blame Eve for his own shortcomings, when he said "The woman who YOU gave me told me to eat and so I ate". God didn't blame Eve, he blamed Adam and punished him accordingly. Eve was deceived (like so many rank and file JW's today), but the Bible no where says Adam was deceived. He knew what he did was wrong (just like the leadership of the JW's know) and that's why Paul said, "thru one man sin entered into the world and death thru sin."
The WTS will get theirs in the end, but unfortunately the rank and file will probably share in it because they knew better. After all we are told expresslly " do not put your faith in nobles, nor in the son of earthly men, in who no salvation belong."
The GB is no different than the Pharisee of Jesus' day, who could lift many burdens from their brothers with a finger (or the stroke of a pen), but refrain from doing so for fear of losing their positions.
Isaiah aptly prophesised about the GB when he said " those people honor me with their lips, but their hearts are far removed from me".