USCIS will probably blame the dead petitioner for disrupting the family unit. It might say that the petitioner disrupted the established family unit when he emigrated to the United States. The beneficiary’s coming to America cannot “undisrupt” the family unit that was disrupted by the petitioner and who by the way is already dead.
Hardship to family in U.S. USCIS will ask how the beneficiary’s failure to immigrate can cause hardship to a family member in the U.S. The stateside family member is not suffering any present hardship, and if there is any suffering it was not caused by nor can it be cured by the immigration of the beneficiary.