I think the author should invest time to improve Itachi's character. I mean, like Itachi is cool in the sense that his a character in the naruto series with a major sad story but can endure, wait no, can sacrifice everything just to protect his brother even if it means his own happiness. I admire him for his traits that makes him so great (this is just my opinion) but then I still congratulate author for writhing an amazing story. It's not the best but this story is still one of the best. You don't read an awesome Itachi reincarnate fanfic everyday.