Regarding the removal of spell vamp
I am curious as to what buffs Akali might recieve. "Draco!" You say, "they're not removing hextech gunblade, wtf are you on about Akali buffs?!?!"
Well here's the deal, the components of gunblade are utterly important in this mess. Do you know which component no longer has spell vamp? If you thought hextech revolver, you were absolutely correct. Akali till now has only been able to lane properly when rushing a hextech revolver, as with her stats and abilities, she's horrible pre six without spell vamp, and gets pushed out of lane every minute or so.
Don't let your dislike of Akali cloud your minds, Akali is already somewhat weak at the moment, and as such is forced to play as tank akali. The removal of spellvamp on revolver will only push her further down and force her to go even tankier to compensate. I think Akali, like Vlad, needs compensation, at least to her early game.
The removal of spellvamp on hextech revolver also affects Kennen, who use to enjoy occasionally buying it to sustain through tough lanes, but I believe that he's besides the point because he never needed the spell vamp. Akali will really be needing compensation for this change, as there is no other item that allows her to lane at the moment.