Make Akali's Crescent Slash do magical damage
Since it can no longer proc "Mark of the Assassin", this is the least useful ability on her kit. It does very low damage and due to its energy cost, it isn't worth using most of time. I think that making it do magic damage would be a good start in making this ability useful, for a couple of reasons. For one, when was the last time that you saw an AD Akali? Second, even an AD Akali would benefit a lot more from Crescent Slash doing magic damage, this is because if opponents were to build armor, Crescent Slash would bypass that. Third, it allows this ability to benefit a lot more from early magic penetration items such as Sorcerer's Shoes.
With the way that Akali is now, she is very clunky. She is supposed to be untradeable, but not only she is clunky, but pink wards render her useless. I don't think that such a buff would make her become overpowered again.
) to bypass said magic resistance.