Court Change is way too situational to be that useful. The moves it affects don't show up that often to begin with. Plus, it wouldn't be the first time a Starter with two sig moves only used one. Greninja never used Mat Block.
We already know a bunch of men in suits are going to show up. And why would Giovanni be tailing Sonia personally instead of sending one of his goons like he usually does? The tie isn't even the right color.