i dont think people understand the question:
1) the eyes need to be implanted- anything else about taking power has never been said ever and I'm very "versed" in sasuke, and no he's not my favorite character, because i don't fanboy over fake shit- i like all of the characters and their contributions (or not cough sakura) to fights or the story. Quit making things up
2) itachi DID go blind- he grabs his face and susanoo disappears because he GOES BLIND
3) never in the manga does it say that EMS will "restore" light to sharingan- only that it prevents the loss
so the question is if this is a plothole