I am sorry, but with all professional respect you can’t justify a diagonal power clean or “power clean like clockwork” to me. You are just begging for an injury. If the desired adaptation is the development of power in multiple planes of motion or in a rotary pattern then work with elastic or cable resistance or throw medicine balls.
I couldn’t justify a clean variant with a jump to a box either. Olympic lifts are very safe if properly instructed and supervised, but there is always a risk in catching a load, and now on top of that you want the athlete to catch a load and jump to a box? Can they even use an appreciable load on that lift? Can they focus on getting extension while their attention is split by the need to clear and safely land on the box? Wouldn’t you get similar adaptations out of a loaded jump squat (jump from the ground, land on the ground) or performing a jump to a box loaded with a weight vest or dumbbells. Similar adaptation (probably greater adaptation), much less risk.
You select exercises based on the expected adaption in relation the athlete’s ability and state of fitness, not because they are different or look challenging.