Is the tech available for "This cooldown cycles X% faster"? Or can you only use "Reduce CD by X"?

In Heroes of the Storm, Li-Li's trait is that her cooldowns cycle faster after she takes damage, meaning she can spam skills pretty rapidly in fights. The big difference between her and someone like Amumu is that it doesn't matter how many hits she takes; whether it's rapid attacks or a single heavy blow, it has the same effect. But with Amumu, the amount of reduced cooldown he gets depends on how often something hits him with basic attacks. As such, it has skewed effectiveness.

Has any thought been given towards changing certain abilities to cooldown faster under certain conditions rather than "if you do this, reduce the cooldown by X"?