Pound of Flesh
It could be said that Ryu's strength really hadn't grown much during the last six months. But, that was only in the case of raw power. After spending so much time turning an unconscious movement into a conscious one, how could there not be vast improvement?
Not only was Ryu's control of his body far beyond what it had been in the past, due to the nature of Osiris, it finally allowed him to break past that final barrier of controlling corpse puppets that had left him stuck for so long.
By now, let alone only being able to control 70% of his body in Osiris, if his previous calculations were used, he was closer to 120% control.
It seemed insane to supersede a 100% control, but this simply went to portray Ryu's own ignorance. He hadn't even realized that the control he exercised on his own body was still limited in so many ways. But now, it was as though a whole new world was opened up to him.