One of the HUGE advantages that a human has over an AI is that we can see their thoughts. What I mean is that we KNOW for a FACT what they currently feel towards us and towards others. Barring any random event, if we are close to someone we can pretty much leave our border's undefended. The same can not be said of an AI vs a player. The AI has NO IDEA of what we really think of them (usually Empire Food- at least to me, though we pretend to be their best buds).
Consequently we are usually never backstabbed (though it HAS happened to me once, which I was happy to see). Not sure why ... it was the Screen "A Secret Meeting occured and it was determined that ... blah blah blah" so maybe it was a random mega event. If so, that is disappointing.
So once everybody loves you there is very little tension left in the game. Of course the flip side of the coin is that if relations play so little role in the game, then Diplomacy becomes trivial - ala Rome Total War. Besides people play the game in different ways. Some play to win at any cost, and some to roleplay, and of course some roleplay by winning at any cost. If the AI played to win (i.e. would happily stab a friend in the back for gain) then those people might think that this was unrealistic.
It would be really cool I think to somehow make this a game option i.e. AI - Play to Win or Roleplay. But that would double the number of AI personalities which is probably an insane amount of work.
The next best thing would be to have an option to HIDE what the race thinks of us. I mean in real life we are only given a person's expressions and words to determine what they think, and a cynic like me knows that that is USELESS.
So if this option was selected, then when you go to the race screen you wouldn't see what they thought of you. What about what they say? Well, maybe each race has a "Deviousness" rating. If they make a random roll and fail this rating then they let their true emotions leak out (WE HATE YOU), otherwise it defaults to the Neutral or Impressed type of greeting, even though they secretly hate you.
Now with this option you DO have to worry whether the Dregin are plotting something behind their chuckles and smiles.
Sure the AI would still have an advantage in that it knows what other races think of IT, (since I imagine this is an important parameter in the AI personalities, which remain untouched), so maybe kick in a few points in gamescore or whatever if the player chooses this option.
Just my 2 BC
Dano