Hi Cold Steel,
"So what was, or is, your take? Any chance people could graduate from being physical beings to being spiritual beings? What do the GP members say about Life After Armageddon?"
As far as I can determine Latter-day Saint theology is fairly unbounded. As some have pointed out to me, many aspects of LDS theology was developed even after the Book of Mormon was published. However, both faiths are attempts at restoration of some imagined original form of Christianity. The progenitor of Jehovah's Witnesses was Charles Russell who focused on Bible study and largely saw himself and his followers as not that far apart of the rest of Christendom. Yet, key parts of his views were things like no hell fire, no immortal soul, etc. But it would be his views on end-of-days that would really inspire the group. In his day Egyptian Hieroglyphs were still a facinating, yet unknown language. Thus Russell co-mingled Bible study with Pyramidology. From the Bible Russell calculated that 2520 years of Daniel ran from 607 BCE[1] would end in 1914. But this was also supported by measurements from the Pyramids.
Not too surpisingly, all Russell's predictions for 1914 failed. Lessor known among the Witnesses is the 607 BCE start date is a miscalculation as well.
In what language did Joseph Smith claim the golden plates were written? Well the claim is Reformed Egyptian, thus you see deference to spooky Egyptian things. Smith went even further, claiming he was able to actually translate a real Egyptian Hieroglyphs, with the results he called the Book of Abraham.
Your descriptions about possible musings of the Witnesses in the new world don't reflect much of the Witness mindset. The ideas, other than reflecting a garden of Eden restored, remain mostly vague and not commented upon that often. Your use of the word "graduate" sounds more Mormon-esq to me than Witness. Elevation of mankind to pefection is within the Witness mindset. But elevation to Godhood as per LDS theology, would be something the Witnesses would say only reflect the original lie of the serpent to Eve.
Practical matters of how the new world would actual work are mostly left unconsidered. Most Witnesses assume how Bethel homes and branch offices are organized would probably be extended in the new system. Logical flaws in their outlook, such as lions being adapted as predators that would need yet further adaptation to "lie down with the lamb" are left to Jehovah to sort out. Likewise, original sin of Adam and Eve is the cause of death (Rom 5:12) to the Witnesses, yet the fact dogs die from the same biological causes as humans is just not considered.
I hope this gives you some insight into their views. You of course, can comment with much more authority on LDS views -- I've only ever been in the Witness faith.
Cheers,
-Randy
[1] Witness publications prefer BCE, which is actually a more neutral designation. 607 BCE is the date modern Witnesses use as the start point based on their unfounded calculation of the fall of Jerusalem to the Babylonians. The actual historical date is 587 BCE. I believe Russell originally calculated 606 BCE, not knowing he should subtract one because there is no "zero" year. But another 1 year error cancelled out the problem. There are several other dates in this early era such as 1799, 1874, 1915, 1918 and 1925 said to have some prophetic significance.