PERFECT SUSANOO of Edo Madara Uchiha is probably NOT because of Hashirama's cells... like I first thought. Back in the days, Madara extracted Hashirama's cells and made it look like he was dead at VOTE. After that; he never fought Hashirama. BUT against those 5 kages, he said it like he had this form in the beginning..
I think that most of us, still underestimate his STRENGHT OF CHAKRA. It was said that he was born with the strongest chakra that the Uchiha clan ever had.. this could mean, that Edo Madara's Perfect Susanoo.. is simple his doing with his own spiritual powers, and not related to Hashirama!
Besides; Sasuke didn't go ALL OUT against white zetzu, and let be honest; why would kishimoto make Sasuke CAST THE PERFECT SUSANOO after gaining EMS, against white zetzu? Something like that, has to be done at the end of the manga: against Naruto.