With Customize+ I've been able to make the OC of my dreams, but it took me a lot of hours because of trail and error. Posing itself identifies bones and where they are in the model, making it easier to see how they change when their values do via the transform. Placing a small transform (or some other RBG indicator) on the bone could lend improved visibility in Customize+.
Thanks in advance if you opt to intake this!