They really did overnerf Sion...Riot has a really bad habit of being like:
Community: THIS CHAMPION IS OP AS HELL! NERF NOW!
Riot: Oh, he's OP? Well we better nerf
Community: Ok, he's probably balanced now, thanks
Riot: We still think he's a tad OP...let's do another nerf
Community: Ok, well now he feels kind of hard to play, maybe we should just wait and-
Riot: You know what? Another nerf cause fuck it
Community: Alright, well he's unplayable now
They seriously just go on a warpath and they just keep nerfing over and over and over. I have no idea what they're thinking...just look what happened to
...he seriously got nerfed twice in a row...in patch 5.10, then 5.12...and that's on top of the indirect nerfs through cinderhulk and gromp...5.13 he got another indirect nerf through
. guess what? 45% win rate now. He's basically shit. They took a god tier jungler and threw him down to tier 2...because they are too fucking impatient, and they just nerf over and over without waiting to see how the first round of changes will really effect the champion. As much as they claim to be afraid of "Olafing" champions they still seem to do it with alarming frequency.