the Sharingan gave Kishimoto the perfect stage for writing many intriguing abilities in the story. From Sasuke's flame control, all the way to itachi's incredible Genjutsu, fans saw it all ...
Where there were once only three, there are now a dozen dojutsu (not counting the different forms of Sharingan ... I can't even tell Sasuke or Boruto's positions!" - Naruto under the effect ...