Blair Fraser said:
Its just a stupid design , why give another alien race a mission that is not your ally or your friend , its bloody crazy.
It works the other way around - you have to earn their friendship. They aren't interested in your needs, they want someone taken out so they will request for assistance. If you can prove to them that you are useful, they will consider becoming your ally. As you please them more and more, they will agree to more treaties. You can even start bossing them around if they are happy enough with you. Ultimately, you can win the game with allies if you can keep them until the end.
End of quote
So why the players have to "earn their friendship" and the AI doesn't have to earn your friendship? Can you give them missions like they do? No. Can you ask money or resources? No. Do they try to make peace with you actively to have an enemy less and focus their fleets in other enemies? (like human players usually do) No.
As others have said here and in another threads, diplomacy, simple or complex, have to go in BOTH ways.
Also, the game needs a relations section like GalCiv2. In my actual game i didn't even knew that my allies were enemies between themselves!. I only guessed it when one of them gave me a mission to kill units from the other AI.