I managed to put the faces changing 1 panel: Mustermann Iconic/panels/tactics/tactics icon info panel overview.xml
You have to substitute this file for another of a skin you like. I used the Material Skin one.
I've made this following the tip on this forum (I believe that GIMN himself that gave the tip): https://sortitoutsi.net/content/64210/mustermann-iconic-v10-out-now
Hope you get the time (and your life is good as well) and we can purchase a light skin! There's none at the time and 20 dark ones
Beside that, thanks for the fm23 version, fabulous!