But studies have shown that heavy resistance training improves running economy and performance in trained runners. Studies also have shown plyometrics improves running economy and performance in trained runners.
They are both in the same wheel house. Each contributes to the performance of the other.
It would also be negligent to solely focus on squatting/lunging without balancing it with a hip hinging movement.
And if the improvement in running economy is due to neuromuscular adaptations the best exercise to use is the deadlift.
The biggest issue with the deadlift is the recovery and fatigue vs the squat.
Alan