I’m just looking to clean up some of the missing pieces of my mobility. If anything I think a lack or IR might make it a bit more difficult than it should be to push the knee out in the bottom of my squat. I also find that it hinders my kneeling position. I want to be able to kneel and put my butt completely on the floor. This obviously requires a lot of knee flexion but I believe there is an internal rotation component.
Still doing the two man IR stretch almost daily 2 minutes each side. Been doing this particular one for a few months. The CNS recognizes the new range but the next day it resets itself.