[Theory] Sasuke lost EMS?
It makes no sense for Sasuke to use MS instead of EMS. None whatsoever.
It's also been shown more than once that he uses MS instead of EMS now.
Got 2 theories...
1. Tobirama said that the sharingan comes from hate. Seeing as how his brother told him that he will love him no matter what he chooses to do ( even destroying Konoha which means Itachi put Sasuke before the village ), it may mean that he overcame that hate, or at least he partially did.
2. Itachi used Izanami. That jutsu seals the Sharingan's light forever. Seeing as how Sasuke has Itachi's eyes, he may have lost EMS instead of losing the eyes.