I refuse to believe that hax no jutsu can magically pop out 2 MSharingans out of fucking nowhere for Itachi to use
The line has to be drawn somewhere
Perhaps hax no jutsu brings back the powers the person had before they had at the moment of death. Itachi had his eyes when he died, so its not far fetched considering he is a walking zombie anyway. What would be weird is if his blindness issue was cleared up.