You should try the Tlingit
In any event, what I am trying to do is create an entire 3rd option that Japan can use its trade slots for, not augment an existing option. It's far more interesting for an ability to do something new, rather than just make something stronger. If +1
and +10%
in all cities isn't sufficient then we can look at increasing the bonus. I suspect it is sufficient, however. The free slots from trade and sailing will give +2
global happiness per city and will make the expansion and growth phases much easier for Japan. The ability to switch onto a specialist focus with a massive global %
rate modifier. This brings back some of the old Korea flavor, but with a trigger that you control with fine precision, rather than the
GA trigger.
I also thought it could be cool if Japan's closed borders were stronger. Like Missionaries and other units that can normally ignore borders can't enter Japanese land without an Open Border agreement or War.