Why the hamstring and the core come first
Part two of the 11+ is not random exercises. Each one props up the chain that keeps the knee safe when a player plants and turns. The core holds the trunk still over a planted leg. The hamstring lower — the Nordic, done slowly with a partner holding the ankles — is the single most valuable one, because strong hamstrings resist the exact pull that drags the shin forward, which is the load the ACL would otherwise take alone. Single-leg balance trains the hip and ankle to keep the knee stacked. Done with quality and enough repetition, these rebuild the movement so the knee stops collapsing inward. Done at speed with sloppy form, they are wasted.
The landing is everything
On the jumps, I do not care how high a player goes. The whole value is in the landing. Soft, quiet, on the balls of the feet, knee and hip bending to soak up the force, never coming down on a straight locked leg. The cue I would use is simple — land like the floor is hot. For the plant-and-cut in part three, you want to see the knee bend to absorb the force and stay stacked over the foot, trunk upright and over the plant. The fault is a stiff, straight plant leg with the knee drifting inward and the body leaning away from where the player is going. That is the collapse, just at full speed.
What I would stop immediately
If I fixed nothing else, I would fix two things, every time I saw them. The knee caving inward on squats, lunges, single-leg work and landings — stop the rep, name it, reset the alignment, knee over toe. And the stiff, straight-leg landing. When a player cannot control a cut at speed, I slow it right down and rebuild a lower, softer, stacked plant at seventy per cent before I let them attack it. A controlled cut at seventy beats a ragged one at full pace every time, and at that stage you are building the pattern, not testing it. Groove it clean first, then let them loose.