I think you should give detail on the skill level. How it affects whether they'll fight or flee. Even the simple stuff like what'll show up in the group menu in the briefing, Veteran, Expert etc. Perhaps a note that really only Special forces should be put on expert and how you can have a squad of mixed abilities by having different skill levels set.
That's my idea. I've hundreds more, like details on Soldiers, Armour, Aircraft, Maritime etc.