The missiles sucked in GalCiv 1 because the AI couldn't use them. All they really did was give the player a huge advantage. They would be awesome if the AI could be taught to use them well. Otherwise, if the AI can't use them, then they just make it easier for the player.
Well, for the description in the manual for the difficulty settings, it says that on higher difficulties, the AI makes better allocation of its ability points. So at lower difficulties the AI either doesn't use them or selects random other abilites. At higher difficulties it most certainly uses them, and makes good choices with them.
Well, I'm pretty sure that "approval", "morale", and "happiness" all mean the exact same thing. Which I think is confusing, they need to all be called by only one name instead of three different names. But the game uses all three words that basically are the exact same thing. As for your question, that tile only gives a bonus for morale-improving buildings like a zero-g sports arena, entertainment center, etc. Not for influence buildings like embassy. Also, it does not affect gala
