A small, yet reasonable, Blitzcrank change he could use

As the title says...

is currently sitting at a 51% win rate: http://na.op.gg/champion/blitzcrank/statistics/support https://champion.gg/champion/Blitzcrank/Support?league=

Q: Rocket Grab

New Effect Upon pulling an enemy champion, Rocket Grab's cooldown is reduced by 6 seconds all ranks

By putting a cooldown reduction on Rocket Grab will allow to perform more frequent pulls.

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W: Overdrive

Attack speed buff, self-slow, and decay removed.

Movement speed increased from 70/75/80/85/90% to 90/95/100/105/110%

Movement speed duration decreased from 5 seconds to 3 seconds

By removing the attack speed buff, self-slow, and the decay will allow to stick to his targets once he pulls them; so it doesn't make very fast and still kiteable, it makes up for a decreased movement speed duration.