Most likely doesn't, His both eyes have KA, Itachi said, shishui's eyes have the ka ability, That is assuming the db explanation of susanno is correctIf only he were healthy when he was alive. His Edo is a prime example.
Well, Ao survived in a fight against Shisui and only called him a formidable opponent, so I wouldn't take him too seriously (I'm guessing Shisui doesn't have Susanoo?)
aka tsukyomi + ama = susanno
and not just double mangekyou = susanno
In any case even if he double mangekyou was the prerequisite to susanno, tobi said susanno is rare
His shunshin must have been something for him to gain a moniker , Typically ninjas with monikers are pretty great or have something special about them yellow flash etc