We never see Orochimaru use CM powers or Jugo chakra for Senjutsu, while we see Sasuke body accepts both CM from Orochimaru and Senjutsu from Jugo.There was a reason Orochimaru wanted Sasuke's body other than Sharingan/Rinnegan when he couldn't get into Ryuchi cave.
Sasuke is compatible with senjutsu/nature energy and can even sense it(VOTE 2) he can learn SM easily but he would be too OP with EMS Rinnegan and sage mode.
Senjutsu Susano exist thanks to Sasuke being compatible to Jugo Senjutsu Raw chakra. Too bad Sasuke doesn't learn Sage Mode so he can use Senjutsu Susano at will.
For now Sasuke is the only character to get a nerf, which was losing CM.