Well, there's choosing the right colour schemes for the mansions, to say nothing of getting the fabric for the throne just right. Then there is the heavenly garb for those who will be standing at the right hand of God. To you, these sorts of finer details may seem trifling, but for those with an awareness of the need to give these climactic occasions maximum impact, many, many hundreds of years of forethought, planning and rehearsing are required. The mistake made by impatient dooms sayers like Russell, Rutherford, Knorr, Franz and others was - as men on missions are prone to do - they fail to think through all the behind-the-scenes work required in setting up the Kingdom. The fact nothing has yet happened is God's way of saying, "When I'm good and ready - and not before."
Remember too, when it finally happens, man, you just don't want a single thing to be out of place or appear unrehearsed. Not a good look, whether on earth or in heaven.
I'm a fuss pot myself, and when I'm hauled before the throne to be dished out all manner of gruesome judgements, if I notice that the fabric on the throne clashes with Christ's heavenly garb, the whole sense of drama will evaporate. What an anticlimax that will be! Hence, God who is sensitive to Impression Management 101, will likely spend a few hundred extra years ordering the angelic forces to go through the whole thing several more times to be absolutely and divinely certain it will go without a hitch.
