Put a cooldown on cyclone

As you all know, in arenas a druid can keep one person out of the action forever with cyclone. They can cyclone a healer and kill the dpser with no problems.
The only way to counter this is to put a cooldown to cyclone, like 20 seconds before you can use it again. Please do that.
Or make silencing shot with no cooldown also, so they can't cast cyclone ever again.