I love the option that we can let AI to run the warfight, in which we can play as how we wish to play it.
Sometime I just like to control only diplomacy and intelligence, and let the AI do the warfighting job. What I mean basically is that this add in more option for us to play the game.
In HOI4 I would like to see a better AI, in terms of a few improvements:
1) Naval Battles
-Form battle group with better combination, I have seen AI using a breaking whole navy fleet into single battleship, single battlecruiser, etc;
-Better amphibious assault
2) Air Battles
-Would love to see AI know how to use Strategic plane for strategic bombing
-Would love to see AI know how to use transport plane for paradropping attack
3) AI need to Learn how to encircle, not just using world war 1 pushing strategy
4) It would be better if we can create a battleplan for AI to execute, where to capture first before going for 2nd objective, or at what situation the AI should amphibious land army at the enemy back.
Best Regards. Will post more when I have more ideas.