While the practise of poligomy is not something I would desire, for me or my spouse it is something that was brought back for a reason. I suspect part of the reason was to demonstrate that what is sealed in Heaven is sealed on earth and what is sealed on earth is in Heaven. So if we are sealed to someone and lets say they pass away and the remaining spouse remarry's. What then is the result in Heaven when they all meet?
If Heavenly Father directs me to have more than one wife it would be very hard to comply but eventually I would. Would you?