All these people pointing out itachi's thing are missing out on one of the big problems with defending this ridiculousness.
Itachi may be blind, but he still has his eyes. They are still physically attached to his body.
Madara does not have his eyes. They are not physically attached to his body. So this whole "Itachi could use his susano'o while blind" is completely irrelevant.
Itachi may be blind, but he still has his eyes. They are still physically attached to his body.
Madara does not have his eyes. They are not physically attached to his body. So this whole "Itachi could use his susano'o while blind" is completely irrelevant.