I've taken to using "opposite lock" in order to try and create a tighter turn when at corner speed in combat.
As the "Y" axis thrusters are spaced about the hull however, they don't push the back end down faster when pulling back so am I imagining that they give me a tighter turn? I have not empirically tested this, its purely a cup-of-tea query.
Are lateral thrusters any use in combat or purely for docking? what do you use them for?
Thrusters cannot increase your turn rate, but the "opposite lock" thrusting you describe can be used to increase your angle of attach on target by allowing you to simultaneously rotate and increase distance to the target (the larger distance gives you a smaller angle to rotate though to get a lock).