The body has to work as one just as my fingers are to type this blog. To more solidly utilize my core and whole body is the goal here. Everyone's capable of reaching great heights rapidly. Humans, however, often feel they have to create some sort of permit to allow themselves to reach whatever goal they have. Being human too, this is probably my case as well. The key is having an openness to admit this and to strive to identify the self-imposed permits or to create more encompassing ones. The learning process is interesting and very nuanced.
So, in short, relating to whole body and the core, what am I doing to re-train? More action without action first of all, then feeling arms beginning at the core (instead of at the shoulder or elbow), feeling the music from the core, opposition, and active listening.