Sorry. I sometimes have a tendency to talk too much. xd
I am thinking from your point of view but I also think that the clan needs Sasuke's fighting power so whatever Itachi left Naruto would be to help snap Sasuke out of this path of revenge without harming him. I analysed what Itachi said when he said that he hopes that the day never comes when Naruto has to use the power from different angles.
The power could be used to destroy Sasuke, weaken him for just a moment or it could be just a message in which Itachi shows himself inside Naruto and they have a brotherly conversation. If this happens, Sasuke would see Naruto as his brother and a person who would ensure that no injustice as the one that happened to the good Uchiha's ever takes place again. With this knowledge Sasuke would abandon his path of revenge and join forces together with Naruto to bring down the bad guys. Hoping the day never comes, he could have mean't that he hopes that the day never comes when his beloved brother has been so brainwashed and gone against what he sacrificed himself for.
Personally I hope that Sasuke lives so that he can use the same power that Itachi used to remove his cursed seal to remove the nine tailed fox from Naruto. I know! I am just being silly.