Got an idea for a MF mini-buff: Let her E reset the duration on her Impure Shot stacks

You know how has his basic attacks reset the timer on his passive stacks, but not add any? How about if the same were done for Miss Fortune's E?

Basically, it'd reset the timer on existing stacks on enemies caught in the AoE, but doesn't add any new stacks. That'd be handy for certain tricks.