If Mike Tyson or a world champion kickboxer came to your school to teach your black belts. What do you think he would work on? Double punches, square blocks, and keeping your chin up?
I’m pretty sure he would emphasize head movement, how to snap your punches and a defense that does NOT include pulling your punch back to your hip.
I’m sure the students would learn advanced applications to adjust for different fighters. Notice I said advanced applications, not advanced strikes.
When you focus on application, you can apply that to almost any technique.
For instance, if the drill is about how to fight a taller fighter, the answer is more about footwork to stay on the outside until you can secure quick access. My brothers are 6′ 3″ and 6′ 4″ so I know something about fighting a taller opponent.
Drills that teach that application do not require complexity. They require simplicity.
The more complex a skill becomes, the less chance it can be used. Have you ever seen a double punch? Only in kata and here: