Add a movementspeedbuff for Zyra, when she hits an enemy with Vinelasher?

Hello,

Zyra suffers as a midlane mage in from of mobility in contrast to other mages. I don´t say its not viable, but playing her in midlane became harder (every new champion got a displacement, Stalkers blade). Other Mages are easier to play, because they have either higher moventspeed or can buff their movementspeed with their kit (some champions can do even both). I had the idea that we add a movementspeedbuff for Zyra, if her Vinelasher attacks an enemy champion. Her Grasping Roots does not benefit from additional cooldown if you max it. It stays at 12 seconds, so it couldnt be abused much in lane. I don´t believe that would be a huge buff on her as a support (it doesnt affect her laning very much unless you build early CDR, -> decision between Mpen rush and Cdr rush). Rushing Haunting guise with Sorc boots would give her still more survivability than a Morellonomicon with Boots of Speed. But, this would effect her midlane. Zyra´s root is no displacement, she cant protect herself from J4´s ganks or Reksai´s for example, with their gap closers and knock ups. She is untouched since preseason 4 and i think this would be a small change bringing her up to date for Season 5.