The meaningful separation is when your hips are rotating forward and not the initial counter-rotation. Counter rotation doesn't automatically improve separation. It can influence timing positively or negatively depending upon what your current delivery looks like.
Counter rotation isn't automatically bad either, some people can manage it, but most can not be efficient with it.
My take on it is this: If your timing is good with it, I'd leave it alone. If your timing is off and you have counter rotation in your delivery, I would work to eliminate it. If you don't have it, I wouldn't add it.