Shunpo / Sondia (as the rules state) are not teleportation. As such, there would be no use for a cooldown because it is simply running. I can see where you are coming from though, I'm not trying to put you down at all. I think BR does a cooldown for it. But I never really supported it. To limit Shunpo or Sonida (especially to a rate of every 3rd post) would severely impact battle. And people like yourself (being the 2nd Division captain) live on Shunpo, so particularly to yourself it'd be quiet bad.
Maybe we could try to work something out with it, but I don't see Shunpo / Sonido usage being a major issue that we have to put everyone through a cooldown and duration, especially after we've already had PFs and a few have even had practice fights IC.