My thoughts were: Colonies should be in the game. The should play a (moderately) big role for the colonial civs, but a minor role in the overall game. How can that be done?
So I came up with what I discribed. It's not that I want complete historical accuracy, but I don't want to focus on them too much because the focus should mainly be on Germany. I thought I found a nice solution for that.
I have my concern about a minimum of harbor requirement. It's likely that the colonial civs can't (or won't because of the stupid AI) have enough coastal cities. (Think of Genoa) So the colonies will end up in the hands of other civs in most of times. It's not that bad if the non-colonials get them sometimes, but I think they shouldn't get it the majority of the times.
We can make the required number of coastal cities low. But then you can remove the requirement altogether, as it makes hardly any difference.
Hidden techs/traits are indeed great for modding. I already coded 3 UPs (France, Burgundy and Sweden) that way. Frisia will also get one that way soon. I wasn't able to do so if I had to hard-code them, like RFCE.
Don't worry about the boxing too much. I just enlarged the cultural area, so you it's better visible on the minimap. The real situation will probably be very different.
-I gave the Swiss the red color from their flag. But as that color isn't defined, it can be made lighter of darker. I'll "play" a little with it to see what's best.
-Same story for Savoy.
-Dark blue for Hesse would indeed work. I'll use the type of blue in there
coat or arms.
-For Lorriane, Yellow would be appropriate. But then it has the "same" color as Baden. (The yellow in the screenshot) We could make 1 a dark yellow and the other a very light one (like China in DoC)
-Red is would also be appropriate for Lower Saxony. (Based on
this) But I think they can have it, even though many civs already have a red color. Hessen will get a blue color. So the only civ with a red color nearby them is Denmark. But the red of Denmark is quite distinced from the other red colors. So that wouldn't cause many problems.