Just that things are getting better in that department. I can — not well, and not quickly — do the 4-3-2-1-2-3-4-3-2-1 sort of thing at last. I can do it best with no more than a fifth between 4 and 1, but can slowly manage with an octave. It’s quite a shift for me — took a long time for my nerve pathways to get the hang of what I was asking of them, and it still is not the most comfortable thing in the world.
But at least it is getting better, if slowly. It will add up in the long run.