You are wrong.What your saying makes no sense for the following reasons:
1) You prove that only things that are physically and intamentely attached to a ninja are revived with Edo Tensie. (You used Kakuza Hearts are an example)
2) You say that since Edo Itachi possessed his Spiritual Weapons they must therefore be attached to his souls and not his eyes.
But you fail to explain why it cant also be attached to his eyes? You never explain why it cannot be attached to his eyes? Because the eyes much like Kakuza's Hearts would be physically attached to Itachi., and thus to Sasuke when passed on to him.
Granted I dont believe Sasuke will inherit the Totsaku Blade or anything like that, then again it is likely as Kishimoto will be looking to give Sasuke another power up sometime soon. But I dont believe that the Totsaku Blade and Yata Mirror are actual weapons. I believe they are just parts of Itachi's Susan'o. Just like Sasuke's Bow and Arrow are attached to Sasukes Susan'o. I believe that Itachi used it in a fight, someone watching thought it was a weapon, and threw rumors and word of mouth it landed to Orochimaru and he began to search it out.
Itachi doesn't have to use them with his Susanoo at all. He just chose to.