If I wanted be snarky I'd rephrase it like this:
Inner Rage has been redesigned. It now reduces the cooldown on Heroic Strike and Cleave by 50% (to 1.5 second) for the next 15 seconds. 1-minute cooldown. It still cannot be used during Deadly Calm. This ability was originally designed to help warriors with rage capping, but the Heroic Strike and rage normalization changes seem to have solved that problem on their own. This new design will still allow warriors to burn off excess rage faster, at their discretion.
But I'm not being snarky.
Inner Rage was designed to allow warriors to dump rage when it was impossible to do so effectively via Heroic Strike. However, we did a good job with rage balance this expansion, and Warriors have been able to dump rage via Heroic Strike just fine. As such, we've redesigned Inner Rage to allow warriors to dump rage faster when it is impossible to do so effectively via Heroic Strike.