I'm not trying to talk out of school, but I'm not sure if the team has a sound/audio person full-time at the moment to address these issues. At least, the last that I remember.
On a separate but related note, I've noticed before that the Golden Horde (1345) and Crimean (1448) campaign map characters don't audibly respond to being clicked on (they just don't say anything). These hurt in particular because I always enjoyed the Med2 Mongol voice lines
On another note, I've noticed that in the 1345 Campaign that the newer factions (Bohemia and Bavaria) are lacking victory condition map art: