Progression between kingdoms will never equal everyone out. If I make it to the Celestial Kingdom and @Just_A_Guy makes it to the telestial kingdom, but we both receive the gift of eternal progression, JAG will eventually achieve the Celestial Kingdom, but will never catch up to me as I have also continued to progress.
I have no problem with the idea of progression between kingdoms. I still am shooting for the top as it is in my best interests.