Just a thought. I think it would be fun to include an option to separate the the AI's intelligence from its economy. This shouldn't be too hard to implement and would allow for interesting games.
Particularly fun would be the dumb AI with loads of money and/or production bonuses, chucking hoards of ships at you with no real tactics. I think it would add some interesting options to the game without taking anything away.
I concede there may be balance issues, so I don't think this should replace the current system (which I rather like), just supplement it.
Any thoughts?
Cheers.