So since the title is long enough without further ado:
Things that are more likely to be added:
1: A Tavern or Inn in every port!: add another section to each city(besides shop,mission etc.) where there is a unique chat lobby that can only be seen by people inside the Inn, and it may be a bit far fetched but maybe even add a unique card game in the future where people can gamble, like the Gwent in The Witcher 3. Make the city channel disappear and force people to enter the tavern to chat with people in the city, or maybe even add a Bazaar chat for trade.
2: I think it is already confirmed but add more flags for each Nation, like the Norwegian flag for the Nord Alliance or Scottish and Welsh flags for the UK.
Things that are less likely to be added:
1: A unique Political system, so i have heard that there will be a political system soon and that every player within each nation can vote who to go to war with, but I think it would be better for a political system like that of the Erepublik to be implemented, which means that elite players past a certain level can pay a huge sum of money to create political parties, players past a certain level can join parties and there will be an internal voting between the members of the top 3-4 parties to elect nominees and then finally a final voting where every player from lvl 1 to 100 can vote and elect a president, the president remains in the office for 2-3 real life months and has certain privileges like having access to the national treasury, commanding AI fleets etc.
2: When the political system is added make it so that attacking allied ships will also mean that you will automatically turn into a pirate, to add more meaning to the alliances, but also limit the number of allies each country can have to max 2 to prevent a peace between all nations.
let me know if you like/dislike my suggestions.