Orochimarus Arms were sealed at that time, so he couldnt use all of his Jutsus
I still don't get the whole arm thing being sealed, I thought his arm problem was fixed when he switched bodies it was never mentioned until Suigetsu said it to Sasuke that he didnt have his arms before Sasuke revived him. Then how did he summon the 3 gates if his arms/jutsu were sealed??
Mr oro was holding bck. I mean who will go full force on a teenage boy