I mean... Saying Akali needs buffs, a champion who is pick/ban in pro games, despite those games being heavily team based (proving how utterly ridiculous she is)... Really there is not much to say in response to that. It is clear that it is just a statement based on personal preference rather than actual ability of the champion.
If we have to consider pro play for Galio, Ryze, Cass, Camille, Azir, Sej, and all the others they want to constantly nerf into the ground, Akali has to be part of that. Her power level is far beyond what that win percentage shows. A lot of people play her that play her into counter picks or are not good with her, at least not good enough to deal with their opponent. It has nothing to do with her actual power level.
A good Akali player completely ruins the game unless you get to pick after her and can shut her down in lane and other lanes do not feed.