A lot of people dislike the AI turning on you, when you've being friends for the rest of the game. This isn't bad, but when it happens in every game, it makes trying to be allies with the AI civs useless.
I propose a new allied status. It should be somewhat hard to get, but when you are allied with someone, they will never backstab you, and you the warmonger penalty will not apply to you for that civ.
To be allied, I'm thinking of (1) one full friendship (2) current status friendly (3) you went to a military campaign against them. Then, you will be able to ally with them, and they will declare war on everyone you do, and you are expected to declare war on everyone they do. (If you don't, the alliance is broken)
I propose a new allied status. It should be somewhat hard to get, but when you are allied with someone, they will never backstab you, and you the warmonger penalty will not apply to you for that civ.
To be allied, I'm thinking of (1) one full friendship (2) current status friendly (3) you went to a military campaign against them. Then, you will be able to ally with them, and they will declare war on everyone you do, and you are expected to declare war on everyone they do. (If you don't, the alliance is broken)