They should make Espionage bigger, expand it like they did with the religion system. We should not get information that easy, like from the demographics where you know how you stand, or even who to attack, if your army is strong enough, etc. Everything should be done with espionage to find out these details.
The AI should behave way better and I am not talking about combat t wich is harder to program but common sense in diplomacy. For example the warmonger issues when defending, etc etc etc.
Gameplay mechanic to create more solid alliances like NATO or Varshaw Pact. Give them custom symbols and names. Can win games as an alliance (option available at the start of game). As well as economic alliances such as European Union, etc.
Bring back vassalage (a must!!!!) and colonization. Vassalage can be voted out at Congress.
New victory conditions such as Economic and Religious.
A general victory conditions where you play all victory conditions, but the game does not end when someone reaches one first, but you rather get points for first place, second place, third place on each victory condition. The player with most points(set at the begining) wins and has at least been first on 1. For example win a victory condition, 2th place on another and 3th place on two others should be more then enough to win the game, or 1th place on 2victory conditions, depends!!
Random Events!
Not be afraind of bringing back great gameplay mechanics and implement some succesfull mods.
The AI should behave way better and I am not talking about combat t wich is harder to program but common sense in diplomacy. For example the warmonger issues when defending, etc etc etc.
Gameplay mechanic to create more solid alliances like NATO or Varshaw Pact. Give them custom symbols and names. Can win games as an alliance (option available at the start of game). As well as economic alliances such as European Union, etc.
Bring back vassalage (a must!!!!) and colonization. Vassalage can be voted out at Congress.
New victory conditions such as Economic and Religious.
A general victory conditions where you play all victory conditions, but the game does not end when someone reaches one first, but you rather get points for first place, second place, third place on each victory condition. The player with most points(set at the begining) wins and has at least been first on 1. For example win a victory condition, 2th place on another and 3th place on two others should be more then enough to win the game, or 1th place on 2victory conditions, depends!!
Random Events!
Not be afraind of bringing back great gameplay mechanics and implement some succesfull mods.