Regional Units - Why?
I hope at some point the concept of Regional Unit is implemented in AOE4. Why? Because most civs got lots of unique units, and, at some point, it’s gonna get harder and harder to create lots of unique units for every civ, when there is another unit that fills the same role (I’m not saying to eliminate the concept of unique units, but this gives more versatility and open space for more options). AND at the same time, there are units repeated in (almost) EVERY civ like the Handcanonnier, who represents a whole concept of gunpowder units.
For Example, Rus Horse Archer should be a Regional Unit, for Rus, Ottomans (and hopefully one day Poland and Lithuania for example), and each one can get (or not) a unique technology, like Mounted Training.
On the other hand, this gives more variability, with less effort. For example, some civs having access to Handcanonnier, and some others having access to Arquebus, just like some get access to Bombard or Culverin (units that fill the same roll, but are different at the same time).
What do you thik about it?