I agree with the submarine idea. Also high lvl turrets have become almost useless??? You can have lvl 15 turrets around your city and if attacked right you may kill one scout or maybe a stug or two. Just seems silly considering time and resources needed for said turrets shouldn't they afford more protection? Not saying they should wipe out a well formed force but they are not even a deterrent once you have airborne units and know what your doing. I would also like to see the fighter bomber in the game (like a Stuka or p-38), only drawback is it may negate the med bombers or p-51 as I think a lot of people would just build the fighter bomber instead. I also get that "gemmers" make you guys money, but they greatly damage gameplay experience and use of tactics. I think that dropping protection or shield should protect city but should put turrets on a 5 minute delay. Silly to allow someone to destroy others units while hiding behind a shield, at least afford a attacker time to retreat in said situation.