A small complaint: The ai is using way too many heavy turrets. I just had a game where all adjacent planets to my home planet had from three to seven (7) heavy turrets. One of the planets had a single cluster of five mkII heavy turrets, along with the normal complement of other turrets. It was a great challenge to take this heavy turret ball down, but I am not sure if I think it was particularly funny. It took me several hours, as I had to attack, then leave and replenish, then attack again etc.
On another planet it seemed that the ai rebuilt the heavies in one concentrated ball, as I was eliminating them. I am not too sure about this, but I believe the planet started out with five heavies in five different turret balls, one in each, but when I had taken out these singular turrets one by one, I finally had to wipe out all five heavies in the same ball. I am pretty sure those five was not concentrated there when I went in first time, I would have noticed that. The battle cost my fleet. Not funny.
Please make a cap for the ai's use of turrets. Two heavies is a nice challenge, five heavies is ridicoulous.