Any english release soon? I may be able to test Khadras issue then, I have all those mods. Also, instead of the green check (which looks not so good) why not use Phoenix mod grayed icons? When the skill is expert, change to those icons.
Another graphical idea: when not known, all skills grayed, then once you pick them, enable and display each advance in dynamic bar (movement one, or magical one-blue):


And what about primary skill pick? Both options user selectable in *ini:

-primary skill control
-secondary skill control

This way you have 100% control on how your hero levels up.