I thought Blitz had a higher win rate at higher Elos.
Blitzcrank is like some weird parabola.
In low ELO's he's god because catching people out and they don't ward or anything to see him. Also the game go long because no-one knows how to end so the probability of Blitzcrank hooking goes up. While it's doubtful the Blitz has good aim people also can't dodge skillshots so it evens out. Also you get the same thing happening in LoL as you do in DotA with Pudge. A LOT OF BAD PLAYERS PICK HIM.
In mid ELO's people generally are decent enough at skillshot evasion and not getting caught that randomly throwing hooks dosen't work anymore.
In high ELO's while Blitzcrank is basically a 1v2 in lane the vision game tends to be advanced enough that he can pull of game-winning plays... and this team is smart enough to actually cvapitalise on them.
I would not be surprised to see Blitzcrank's lowest winrate ~Gold; highest pick/ban banrate in Bronze and highest winrate in high ELO.
Although to be fair Bronzodia is somewhat outdated. A modern Brozodia would be something like Yi [He loses 4% winrate between Bronze and Diamond]/Darius/Amumu [Highest winrate in Bronze]/Jinx [52% winrate; 30% pick rate]/Leona [See Jinx]
Also it's so nice to see Jinx back to being a really high pick rate and win rate /sarcasm. [Across all ELO's she's 52.3% win; 28.5% pick]
Edit:
I'm wrong; apparently Blitzcrank's winrate rises with ELO steadily while his pick rate falls rather dramatically with ELO. [Bronze 51.33% win; 27.07% pick. Diamond 52.69% win but 18.25% pick; going from over 1/4 games to less than 1/5.]
