sasuke also implied that a higher form of ssn would induce even more acheNo, in the war arc he constantly released Susanoo here and there, he didn't have it on 100% whole time and also he was infused with Kuramas power that gave him a huge chakra boost and protected him from damage, to an extent.
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now , to the war arc (b4 getting kurama cloak) , he activated V4->V1 to fight zetsu fodders , used legless complete ssn to fodderize juubi clones (around the same amount of time he last used it in the summit) yet he didn't complain about it.....
doubt about what ? the OT?people nowadays have so many doubts...=D
OT: To conclude , it's more likely the case that kishi has been turning a blind eye to the drawbacks of SSN when it comes to EMS(or even MS sasuke vs danzo , alas)