Yeah, the only thing that even gives us slight amounts of trouble is now that we've got to support planets every 2 hops along the way to the AI homeworld... but we've still got plenty of left over turrets and a 5000 ships fleet to cover that. Honestly, between the superfortress, radar jammer 2, shield inhibitor (still half built) and the lightning 3/tractor 3 combo plus all the other stuff like heavy beams and lasers, NOTHING is getting through.
Heck, even if you unlocked every ship on every planet to attack us we could probably take most of them out as long as they didn't hit all at once. Of course, if that planet dies, we'll be in serious trouble