Idea for Eve's Allure (Lust Dust)

Why not have it work in someway similar to Warwick's passive? Where if the enemy gets below a certain health percentage, the heart will start to fill over the enemy automatically in relation to how close Eve is getting to them Eve would also get a movement speed bonus when moving towards them, that way Allure could be recast to cause the charm maybe like a skillshot similar to Ahri instead of having to be a proc from an ability. Also, the passive with the heart filling would automatically give the MR shred if it gets full.

Obviously the MR shred would have to be a little less, but it would certainly make things interesting?

Thoughts on this? I know my ideas are usually unworkable since I don't know the numbers.