Is it just me or is there too much room allowing you to basically ignore other civs?
What about reducing world size/raising number of Civs? Huge map defaults at 12 Civs... if you think there's too much room... just raise them to 16-18, if you still think there's too much room try 18 civs on a standard sized map. The game lets you completely customize this gameplay aspect so you should be able to find your sweet spot.