It clearly doesn't need a buff since it has been buffed recently. And I don't think nerfing its damage would affect her so much because she generally use E to dodge skills, get away from bad situations, get close to enemy and chasing them.
Maybe some changes will be made in its Cooldown and Energy cost but still, I don't think it needs a buff.
I agree with SELORONIOS here. Akali feels overall quite balanced I'd say. From patch 10.19 her Five Point Strike will deal -5 damage and will have reduced AP scaling from 65 >>> 60%. I really don't think those changes were neccessary but Riot knows better then me.
Maybe some changes will be made in its Cooldown and Energy cost but still, I don't think it needs a buff.
source