what is QL? I usually undergo plenty of stretching, activating and foam rolling before my workouts. Focusing on the hip flexors and what not but i think it is a structural thing for me where my hips may be uneven due to a shorter leg, I'm not a PT or have actual x-rays done on my hip alignment so i don't know exactly what it is, but my therapist confimed that one leg is shorter and the femor of the shorter leg is smaller?
Case in point, if i do a single leg hip bridge, one leg i feel in the glutes, the shorter leg i feel it in the hamstrings. But for the big exercises like the BB squats i try to use the shorter or weaker leg more than the other leg to compensate, but often times the knees usually "caves" in. But it seems to working as i can feel it more. and with deadlifts, i set my shorter/weaker leg feet forward than the other and that seems to balance everything out.
Since i've been doing single leg exercises like SLRD, Bulgarian split squats, etc...I think that has help bring up the weaker leg to some extent. That and being able to do full squats almost ATG.