I am among those who believe that there are certain CO's who are too vested, don't believe, but can't leave. So they leave little clues, getting overly enthusiastic for example over another generation change.
Amazingly, the more stupid happy you are as an elder or CO, the better you look, even if you are totally being sarcastic. I gave more the a couple of talks where inside I was rolling my eyes (I gave a couple of talks hyping the Kingdom News tract campaigns, and I was so full of saccharin that the real true believers were crying...).
If this CO really is that excited, all the better. I put even money that he is trying to get some low hanging fruit to think a bit. Being enthusiastic about another failed prophecy is a good way to get the gears creaking. I know it worked with me. Whenever a CO said "We've changed again, isn't that great?" I thought, "No, not really...."
I remember one CO saying "We are a progressive religion. Do you really want to be a part of a religion that never changes as the light gets brighter?" Call me cynical, but looking back, I don't think that was an accident. I think that was a way of saying "We are going to change whatever, whenever it suits us."
