Now since AA50 comes with no convoy zones, I think this national objective bonuses should involve sea zones. Maybe one land territory, and some adjacent sea zones, to represent the income from ship lanes and international trade, and benefits of using ships and not trucks or trains. But as it is now, you get bonus for holding land territories only, and that is doo bad. Just my opinion.
I remember Griffy talking about “Wet territory”, and this was important sea zones that would benefit the controller. So if you had a naval unit in this spesific sea zones, you got a bonus IPC income.
My suggestions on how it should be:
Italy should get bonus for Italy territory and the adjacent sea zones in Med.
UK get bonus for Canada, sea zones 1,2 and 3 plus UK
US get bonus for Panama and sea zone 20 and the one on other side, dont remember nr, 60 something.
USSR get bonus for Karelia and sea zone 4
Japan get bonus for Borneo and adjacent sea zones, East Indies and adjacent sea zones, and so on…
you get the idea