But he did not put an eye on him, in him if you want to do the pun but not on him.

Why didn't he not do some fancy cursed seal or something when he had Sasuke unconscious for days to implant his eyes. Literally he had no way to control Sasuke what so ever, he knew Sasuke would kill him at a moment's notice based off Sasuke trying to do so in the forest after Killer B. Sasuke also betrayed Orochimaru.

Tobi also was not trying to revive Madara, he would revive Madara if he had to, if he was unable to remove his curse seal that allowed him to become the ten tails jinchuuriki but Tobi rather be the ten tails jinchuuriki so he could make sure Rin was in the dream world.

If his goal was to sync Sasuke to Gedo Mazo (he told this to Zetsu in the forest where Sasuke tried to kill him) then EMS was not enough. You need an actual rinnegan to summon the Demonic Statue. Thus Tobi need to reacquire Nagato/Madara rinnegan but if he reacquired it he would want it himself. Or he would need to evolve Sasuke's EMS to a rinnegan like Madara did. The problem with that is if Sasuke was such a key player, why the hell was Sasuke allowed to just walk free?

My point is either Tobi did not need Sasuke so why is he bothering, or he needed Sasuke so why is he allow Sasuke so much freedom. If you are unable to square this circle then Tobi seems to be just bothering with Sasuke so Sasuke seems relevant to the story. Or Tobi is just bad at master plans which kind of makes sense for he could kidnap Naruto anytime as a baby.