I have no idea what I look like while I'm playing, would be interesting to know...
But maybe it would be a good idea to feel the intensity of the music, in performance context, that is, you think of how one piece leads into another and so on from a purely "performance" perspective, and what you are trying to achieve overall with the pieces. Your expression in between playing should match this unity of emotion, and not just display the result of focusing too hard on the pieces. After all, playing in puvlic is also partly showmanship, or even to a great extent. There are some who overdo it of course, and some who can do without it, but I feel the body language at the piano can also import a lot to the music without requiring more expression in the actual music.
I suppose your recordings are very expressive though, and I value those
