I am a P-groover. (Who am I kidding, I’m a 3rd Striker, but that is a different story.) And I have been playing around with Sakura.
When I get her meter charged (by whiffing dive kicks like a mad beast) I go into guard break strings with the fireball and the hurricane kicks. The beautiful part is that you can cancel either of them into super on xbox/gc and land super by keeping up a pressure game.
My favorite is hurricane - canceled into uppercut super. Super fun to get your opponent just before guard break and then do hurricane - guard break - supercancel - uppercut super.
One thing to keep in mind is that the dive kick will cancel into super, but the super will whiff if you do it.