I hate to use an Internet cliche, but.......
"it's pretty gay"
What is up with all these small ships having 34-58 attacks and no defense, and then their large ships having 5 defense and 29 attack?
It's just ridiculous and it makes defenses semi-pointless. The only counter I can come up with is to build a massive ship with tons of defense and very little offense, supported by a bunch of smaller ships with little to no defense and tons of attack.
It'd be nice if the AI tried to balance their ships a bit more realistically. What's the point in having defense techs if no one is going to use em?