I wish EU4 had more automation, the amount of micromanagement there was awful. And this sort of game is more interesting when you can focus on the big picture.
Sadly I don't trust ~~Hipsters' Electronic Arts~~ Paradox to do automation right. And by "right" I mean:
- Transparent. You could reasonably get why the game AI will / won't take a certain decision, without spending hours in the wiki or fucking around the game files.
- Flexible. The best decision is often circumstantial, and playing styles are a thing.
- Powerful, but not overpowered. The AI's decisions should be decent, but not the best - a player who takes the time to learn how stuff works should be rewarded. (Or even better, tweak the AI so it does the best.)