The optimal cues or points of focus are specific to the individual, but I think the main benefit of your change of focus is that you are no longer trying to consciously monitor and micromanage limb actions that are too quick for you to keep up with them. There are elements of limb motion during the stride cycle that occur so quickly the only way you can consciously feel them is by exaggerating them (usually unconsciously), which retards the limb movement and stride frequency and also causes unnecessary muscle tension, all of which will slow you down.
Once proper technique is in place, the less you think about it, the better. At that point you tend to become more aware of when your technique is not correct rather than when it is. The proper technique has become automatic and second nature, it’s when something doesn’t feel quite right that gets your attention.
true because when i think lift knees i pop up 2 early and when i think push hard my hips drop and in full stride i pull a hammy from overstriding so the best cue for me is to move the cm not the legs