Kakashi's version of mastery and hers might differ, we'll have them talk about it thoroughly as we proceed, but Sakura will definitely be introduced to more techniques as we continue!

At that very moment Kakashi is going to sidestep the desk Tsunade throws at Sakura. Don't call her old, man, not even Kakashi could protect her from that! With Tsunade's training she could definitely learn Shotgun though!