Alien mod sounds great! As others state, would like aliens to get progressively tougher to liquidate as time goes on. They should eventually be almost as much of a threat as advanced enemy units (except possibly the highest tier ones.) Would also like a reason for keeping Hydracoral around, making it worth preserving from extermination...perhaps production bonus, health or culture per hex? Seems to me that it could have had a much larger part in the game...of course there would be the typical BE tradeoff for it so the choice to eliminate or protect has some bearing on your overall strategy.