What I'm asking is bigger than that: What if God had no idea what the structure or makeup of the future held? What if heaven had not yet been designed? There is no blueprint. It has never occurred before.
Guess what... heaven is not yet designed. :-)
There is no blueprint. What is to come has never before occurred.
Do you think the present was designed 13.7 billion years ago? Think of all the billions and billions and billions and billions of events that have brought existence to this point. Do you really think someone planned each and every event? Do you think there was a design for each little step? If so, then what would be the point?
IIRC we are about half way through our sun's life time. In terms of the universe, well, there is most likely at least another ten to fifteen billions years left. So, do you think it is all planned out?
I don't think we can begin to guess what is to come over the next billion years... think back and reflect on what has occurred in the past and know that the mystery is yet to unfold.
The universe is full of surprises!
Heaven? I'm not exactly sure what is to come but I can pretty much guarantee you that the heaven of Joseph Smith's creation is NOT it.