From what I get, and if I am any near right, Sasukes Ace Card is The Cursed Seal and we all know that if your going to be something in the Naruniverse you need atleast a set of eyes...
So, what I see it's alwasy been eyes against everything so Kishi probably needed an annoying plot-hole to make this work.
If the upcoming chapters continues walking the path it is doing now, it seems that Sasuke>Itachi....
...but maybe something will supriese me.