Akali needs less late game energy use on E.
Since it's on a 1 second cooldown and it's pretty spammy with CDR your energy runs out so fast you can't even use E late game unless you wanna be stuck with no energy. Which is such a huge thing because when you constantly run out of energy the enemy just free pokes you and you cant do crap for a while. Or buff her total energy so she can do something to multiple people without dying. She can't 1v3 or more at all and even 1v2 is a problem because you basically rely on sitting in your shroud for the entire duration after killing the first.
Basically for a late game champion she has a bad late game with her energy use.