What countries with unique focus trees do you think need a rework and why?

With Germany and Hungary getting major reworks to their focus trees with Götterdämmerung and India (the Raj) getting a rework with Graveyard of Empires, which countries that already have with a unique focus trees are in need of a rework the most and why?

For me; this is the Japanese tree

Japanese tree is definitely the weakest of the big powers. The historical path is decent but still feels very weak, the democratic and communist paths while interesting concepts that have potential just lack much detail and flavour.

All other paths while having interesting concepts feel poorly implemented and feel under developed with the communist tree feeling incomplete, the democratic tree while interesting feels under developed and the non aligned tree is basically the historical tree but worse.

The navy expansion tree makes no sense considering both gameplay and a historical accuracy perspective.

The army expansion feels lacking considering everything that happens in game.

For the time of its release back in 2018, it was pretty good but now it just feels lacking.