They think people who died before the Big A who never had a chance to know "the truth" will get resurrected, but what about the people who won't know about it when Armageddon comes? Is your salvation simply a matter of lucky timing? It would make it like a lottery, some get a chance, some don't. When I became a JW I was told that Jehovah was going to "speed it up in his own time" and by the time of the end everyone on the earth will have had a chance to know about him. But it was impossible then and it's more impossible now. They aren't growing more than the general population, so every year Armageddon is delayed means more people who don't know about Jehovah who will be bird food because they didn't die at a good time.
They keep talking about how close the end is, but how can that be if everyone in earth has to get a witness? Most people in the U.S. don't really know what JWs believe, never mind the millions in countries where there are few JWs, and no real effort is being made to get the word out either. They seem content to stand next to literature carts in train stations. How is that lifesaving preaching work? If that is how God will give people a chance at life he is a cruel practical joker.