Whirling Blades

Whirling blades is a mobility skill that is actually sincerely hard to use.
In fact, whirling blades is the hardest of all mobility skills to use.

Please remove or reduce the 600ms cooldown/attack time

Removing this cooldown would be the best thing that's happened to me in years.

+rep

What you claim is cooldown is just an attack delay. If it was a cooldown you couldn't reduce it by adding more attack speed, which is precisely what you would do to make WB faster.

It's a really good movement skill on the right build

The (IMO ugly from design perspective) thing is that you can get faster by "interrupting" the final delay per moving. If you just keep the Whirling Blades button pressed and dont have a lot of attack speed its really slow. IIRC there are also some weird weapon speed dependencies. Anyway if you keep the move button down while using Whirling Blades its faster.