Too bad that no mod change anything in this department, have to wait for civ 6. I had a dream, when you can pick civic that makes you nuclear power with increased maintance, allows tactical nuke strikes to most units, and shows progrees in development in nukes, first only on big bombers, later short range missile, longer range missiles and at the end ICBM and SLBM's. Its difficult to say if nukes in current form are overpowered, couse we dont know what single missile shows, its 1 missile, or 10, what yield? End game with some theatre defence against nukes would be fun to play, and add depth to modern era, but would be difficult to teach AI to use it.