Idea : Unit Composition changing

[Mithridates VI Eupator]

I don't know for sure, but I think that this is hardcoded. However, there were already in EB1 some regional auxilliaries for the romans, that were roman-ish, but still with typical local traits, such as weaponry and armour. Maybe some additional units of this type would do the trick?

[blacksnail]

Specific stacks of units altering over time is an awesome idea, but I suspect it's hardcoded to prevent that. Which is a shame, as that is an awesome idea.