Sion win rate

From statistic, sion mid game is the moment when he wins the most of his game. However, the win rate of Sion ridiculously goes down when he approaches late game. Why? Simply because Sion E become useless, his E deal no damage, he looses a certain time to make it and that can only touch one champion. So, his E is not helping him during teamfight, it is just "helping" him against one champion, like during early-mid game cauzes others champions from other side are less in group, that could explain in certain part his higher win rate at mid game. In other hand, his W passive is not really useful, because lot of champions or items deal max. health dmg, so his W passive doesn't really help him too. Also, his damage from any souce of him becomes not enough versus others champions at late game, but his damage is enough at mid game because people didn't buy all their items, so he can tank and do all his abilities, and people don' t deal so much damage to him due to low itemization.

As a result, Sion damage's become negligible longer the game is and only his CC makes him something... so, when he does all his abilities (R,W,Q) he is not really something if you ignore him and if he failed his ult... he becomes really useless. Additionnaly, his passive "Glory in death" is also not very useful cause Sion can make less actions than Karthus who can do all his abilities during a clear time, Zyra that shots a projectile who go through units and deal true damage, Kog'Maw who explode dealing true damage and can't be stop, but for Sion passive, you just have to stun, slow him to counter his passive.

So, Sion needs a bigger damage at mid-late game and his passive and E need a change to be more useful, as an example, Sion W passive should scale with an other thing than his shield to get an advantage versus max. or current health damage or one his ability could herit the old name of darius passive named "Blood rage" that could make him in rage and get attack speed, lifesteal as his old ultimate "Cannibalism", same if his actually passive seems to be connected with his old ultimate, but his actual passive is not so useful because he needs to die to use it and easily count by CC or just by running.

Ironicaly, he is described as the champion of Noxus and a giant beast who drink blood, kill an army alone in the lore, but he is countered by Darius, Swain, Vladimir... that make a lot of people of Noxus who can count him....