I have heard that "paradise" will be achieved gradually; that it will take all of the thousand years to reach that state of perfection.
Now, while you may be convinced that it will take all that time to bring the earth back to it's pristine state....suppose it applies to humans as well?
Imagine this scenerio: wounds and broken bones heal slowly and gradually; your bags and sags are still there, but since you have seen results of other people, you hang on that the promise will be for you, too. (Some people may be more priveleged in their 'standing' and thus, faster results.)
Imagine, having your body continually heal for the next five hundred years, but still having sorrow, heartache, and pain of watching loved ones die because they are still going through the thousand years of judgement and being condemned in spite of 'serving jehovah'; they didn't 'do enough'.
How great would it be to live forever with another 800 years of sorrow and heartache until all perfection can be "worked out"?