Idea for Vayne's Tumble

Instead of empowering the next auto attack; why not have it split between the next three like Jayce's W- Hyper Charge? (Obviously without the maxed out attack speed)

30-75% bonus AD split up into 10-25% bonus AD per auto attack. Tumble goes on cooldown after the first auto attack (to preserve fluidity in teamfights) as opposed to 30-70% in one auto attack.

Would reduce the overall burst of Vayne, slight reduction in DPS unless she crits all 3 times. Should preserve her dueling identity while weakening her power in bursting and teamfights.