This idea was inspired by another post I saw (but forget who or where) referencing the mootness of delaying Armageddon now that the 1914 generation is gone. (I just skimmed over the post and thread, and didn't give it much thought until later)
WT doctrine basically says that Jehovah, through his undeserved love, allows wickedness so that people can hear, and accept, the 'truth', thus being saved from the destruction of Armageddon. Now, here's the problem. The longer Armageddon is 'delayed', the more human life is set up to be destroyed. Look at 130 years of WT existance. Assuming that this is the one true religion, it's apparent after 130 years, most people of this world aren't accepting that fact. Yet, this old system lingers and lingers, the population increases, more people join the ranks of those to be destroyed, while the ranks of the 'faithful' remain bascially stagnant.
The world population hit 2 billion around the year 1927. Had Jehovah destroyed the wicked in 1914, 1918, 1919, or 1925, as predicted and hoped for, then that's 5 to 6 billion people who would have never suffered destruction. Better to not be born than to have the rug yanked out from under your feet by a vengeful god.
Of what use is it to wait? The world population is increasing exponentially (compared to JWs anyway). Delaying - or allowing more time before, in JW parlance - Armageddon is not allowing 'more' people to be saved, but is adding 'more' people to the list to be destroyed.
Nice god you have there, Watchtower.