This guys a retard just ignore the OP.
Calling people names does not add to the discussion, just shows your personal lack of class and good upbringing.
On an easy level AI
Wait, what? You beat game at 'easy' and claim that its... too easy?
Can you read with understanding? Let me reiterate in case long sentences are a problem for you: "I am not talking that the game was too easy to win, but the AI just does not seem like it has any direction". I had the game pretty much won by turn 140 or so. But that is NOT the point.
After I made sure no remaining empire is a threat I went for a scientific victory and empire building. I left every other empire to its own devices. They did not try to expand, they did not try to compete with each other, or me - they did absolutely nothing. Diplomacy was a joke, a guy with bunch of pikemen and 3 cities made off-the-wall demands with the army of my BattleMechs at his gates, making a paceful resolution impossible, even though I really, really wanted to make it work.
AI, even on an easy level should still behave, well, intelligent. Otherwise it is taking away from the realism of the game. And what do you get on higher difficulty? AI cheats with stats, but still behaves retarded, taking away form the realism of the game.
You can balance any game so it is unwinnable, but that does not make it a challenge. It just makes it feel rigged. Good AI would give you a run for your money while on an equal playing field. After that many years of gaming industry they made enormous progress with graphics, but 0 progress with AI development.