I remember when Itachi (alive) was talking to Sasuke that after EMS is unlock,there is a new jutsu activated.
So far we have not seen Sasuke unlock a new ocular jutsu during the war arc (perfect susano donot count ) but he was given hashirama dna/chakra along with a binding jutsu.So kishimoto probably forgot about EMS power and rush Sasuke power to rinnegan/elder son eyes because he meet the criteria for this to happen
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So far we have not seen Sasuke unlock a new ocular jutsu during the war arc (perfect susano donot count ) but he was given hashirama dna/chakra along with a binding jutsu.So kishimoto probably forgot about EMS power and rush Sasuke power to rinnegan/elder son eyes because he meet the criteria for this to happen