Spirit World and Millenial Progression
Virtually all spirit children will be born and die without knowing the gospel (99.99%) Why do you think that is part of the plan? Virtually everyone will learn of the gospel in the Spirit World and be judged at that time. How is that different from the final judgement? Does that infer that progression or regression happens during the Millenium? At what point does progression stop? And if so, is it our Father's will or our decision to reject him? Just a few questions that I am grappling with at this time.
Unfortunately almost no one is interested in following Heavenly Father to perfection. Judgement is a constant action.
As to the Millenium, progress stops when we stop it, having decided we have learnt what we need to know.