By "body english" are you talking about hip pivots, twisting the wrist on the final stroke, or aligning in one direction while your stroke is offset in a different direction from your vision? Or are you talking about using portions of your tip to create varying pivot angles at varying bridge lengths? I mean, there are players that do all of these things to fill gaps, and it's a trial and error process that they work on until they get it working, until it FEELS right.
You described feel best with the word "experience ".
And, being a musician, I can say you are 100% incorrect about the concert pianist. They do choke and strike the wrong keys here and there, but 99.9% of listeners wouldn't know it because they don't have the ear to recognize slight tonal mistakes, and because the pianist immediately improvises and moves on like it was meant to be played that way. They can do this because they are one with the instrument, feeling every tone, not just hearing it, but feeling it. They play on autopilot due to the feel of creative flow. And it DOES require an inordinate amount of time to develop this free-flowing ability, typically a few years of finger exercises, hundreds of hours of painful practice, and then there's ear training, music theory study, etc....it isn't something a non-musician can learn in a short time by simply buying a piano, taking a few weeks of lessons, and watching a few YouTube clips.
In contrast, a non-pool-player can buy a cue, spend a few weeks with a good pool instructor, and become a decent pool player quite easily. When comparing musicianship to playing pool, the lists of fundamentals and required knowledge are worlds apart. You can become an incredible pool player by simply developing solid basic fundamentals -- stroke, grip, stance -- and a basic understanding of cb and ob reactions/movements. To become an incredible musician you need to develop the basic fundamentals of playing your specific instrument, and you need to fully understand all aspects of music theory, and have an ear that allows you to hear everything going on in real time so you can get into the flow of the music. What pool and music share is the ability to be able to enter that flow, that zone where you're automatically performing at a high level with very little conscious effort. That's FEEL at its extreme. It's tough to explain, but when it happens you know it's happening and you ride it out for as long as it lasts.