For plot purposes, the ages are a bit different in this. Hashirama and Madara died a lot older than they did in canon. They still died in the same way and at the same time, but they are a lot older. Hashirama in this fanfiction was around 40 when the village was created as was Madara. Tsunade was born a bit before the creation of the village, as was the rest of the Sannin. The villiage is 50 years old. Naruto is 45. Hiruzen is still in his 70s. Hope that clears up any confusion.
Naruto's mangekyo abilities are slightly different from the normal abilities of the uchiha. His left eye has Tsukuyomi but his genjutsu allows him to kill whoever is trapped inside. To not make the ability overpowered, it is only effective if the opponent is weak enough to not resist it. His right eye allows him to slow down time. Not like how the sharingan usually would but he can actually slow down time to a point where people and things move in slow motion. That's why he will be able to speed blitz certain opponents. I wanted to incorporate one of his abilities with Madara. I think he had the ability to rewind time. Correct me if I'm wrong but that's my reasoning for this ability.
If there's any more confusion, feel free to comment.