I just had an idea!

[Giorgios]

Not sure if it is do-able or not, but is it possible to make an allied AI faction simply unable to attack you, much as the three Roman factions in RTW could not attack each other? It would make alliances much more important and reliable, though I expect it's impossible to do. Thought I'd throw it in there though!

[RPK]

It would make betrayal impossible, which I think is a bad thing. The player should be forced to keep their relations up with their allies.

I remember GrandViz's Ultimate AI had very stable alliances(If relations were good), with allies helping out against enemies and so on and so forth.
But your faction also loosed reputation for no reason, don't know what that was about.

Anyway, I'm pretty sure it's hardcoded.

[OdinX]

It would make betrayal impossible, which I think is a bad thing. The player should be forced to keep their relations up with their allies.

I remember GrandViz's Ultimate AI had very stable alliances(If relations were good), with allies helping out against enemies and so on and so forth.
But your faction also loosed reputation for no reason, don't know what that was about.

Anyway, I'm pretty sure it's hardcoded.

[Azim]

We couldn't completely stop the AI from attacking you, but as RPK said, that might be a bad idea. We haven't started campaign AI beyond the active rebels project yet, but we will probably make the AI less likely to betray you - if you have good relations.