The Sage power is not having SM its different please show me where does he have SM ? Hashiram's chakra means little to none or else he would have Hashi's sign for SM . SM Chidori on Kakashi ? Since when does Kakashi has SM you lost me in here
.That was not SM and come on that was an asspull .
Yes it kinda is since it comes from the nature all around. Instead of gaining chakra from your body you draw it from the energy all around you, but it still comes down to chakra. It's chakra that gives one the SM abilities. Hashi's sign of SM was on the chest on Madara's case, who is to say it's not on the same spot on Sasuke as well? But even if we do take that out, the thing is that Sasuke still has Sage powers from the Sage itself. All he took back was like I said the sealing powers.
SM chidori on Kakashi was when he received Obito's chakra which turned into Sage chakra by becoming Ten Tail's Jinchuuriki.
Call it asspull or not, but it is in the logical ways of chakra-based rules even if we're talking normal one or sage one.
Hope I made myself clear, if not, I'll try to explain better...