People, i know its easy for human players to conquer NA. What I wanna know is why the AI are not succeding
AI management of naval logistics is not sufficient to beat another AI of same skill that does not have to manage naval logistics, even if it would otherwise have a large advantage.
The AI also has poor understanding of colony management.
Also, right now there are bugs with federations stealing land w/o war + bug with truces, and the AI can't/doesn't know how play around those bugs. That these should be fixed is uncontroversial, I hope.
if this will be fixed in new patches.
Probably not, they've tried on and off for many patches. It's improved somewhat, but still nowhere near comparable to its ability to march on land.
This is similar to the reason Portugal never makes serious headway against Kilwa, and that Europeans can't press an objectively large advantage against Indian nations even during the windows in the game where those are most meaningful.
But now, they are getting too powerfull for the AI, and we need to find some middle ground where natives can still have the possibility to grow and beat the colonizers, but most of them should, one way or other, fall to the colonizers.
This preference has been stated many times over the years on EU 4 forums, but it has yet to be backed by reasons that make said preference coherent.
Why "should" most of them fall to colonizers? I have yet to hear an answer that does not have bizarre implications on EU 4's rules as a whole and imply forced/shoehorned outcomes generally.
The fact of the matter is that if the Europeans were actually the inept imbeciles that the AI is consistently in EU 4 when it comes to intercontinental logistics, then the western hemisphere would never have been held, same for India and East Indies. While the methods the Spanish used to conquer Mexico/Peru were awful, they were also not something the game could replicate, or even model. A human might ally one Indian nation and get it to betray others to make conquest easier. The AI though?
Its not about history only. Its about playability.
You can say that all you like but without something like machine learning AI (which would outplay you with sufficient training and make the game unwinnable) it's probably not feasible. You'd have to alter the game's rule structure from the ground up, to the point of making a new game.
You'd also have to come up with a way for Asian countries to progress/succeed in a way they did not historically, that still makes sense in the game model. If you can't, you wind up exchanging one set of ahistorical rules for another (because for example the game allows Bharat to hold Spain and culture drift to Spanish, after which their tech restriction just for being "Asian" would be...awkward).