I don’t think so. The Witnesses will always focus on the “end”. It is one factor they use for motivation.
Focusing on the end and relying on god to fix everything does awful things to people. It shortens their perspective and seems to limit the motivation to make things better. If one thinks the end is coming soon and god will usher in a paradise, then that person typically does not (1) educate himself, (2) take care of the earth, (3) build businesses and relationships that last a lifetime and (4) live life in a way that strives to make things better now. I think this list could go on and on...
A key difference between Mormons and Witnesses is – while both think it is the time of the end – is that the Mormons strive to be successful in this life because success in this life carries on to the next life. It lengthens their perspective. The results of a long term perspective are the exact opposite of that which are typical for Witnesses- businesses are built for the long term, they focus on education and live life based on good deeds that make things better now. I realize that the motive for doing such things may not be altruistic, but the results seem to make Mormonism more palatable to people in general.
A change in perspective that leads to changing the current mindset and behaviors of typical Witnesses would be so profound that I don’t think it could be done in even a generation (a real generation).