Katarina's Ultimate is... lame. What would make it more interesting?

This is just some thinking, but when you get to using the ult (I've played her enough to get the idea of her kit), it just... happens. Beforehand, you're micromanaging your abilities and daggers, while the ult is just an AOE with a max of 3 targets and Grievous Wounds. Snore. What are some ways to make it more interesting, like the rest of her abilities?
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