User blog comment:TheTobarMethod/A New View On ADC's IMO/@comment-98.246.3.43-20130211054252/@comment-5556439-20130211125326

Because she makes use of tumble quiet frequently and relies on it to reposition constantly, deal more damage and dodge skillshots/nukes. Her E allows for hard cc that really allows her to get YOU in a bad spot so her kit revolves around a mix of both.