If there is one thing that makes my interest in Civ V go down from time to time is the lack of surprises during the course of a game. I play on Immortal, and in half of my games, by the Renaissance it gets pretty obvious that either 1) I won, or 2) there is a runaway AI that I will duel with until the end of the game, with every other AI just watching (if they are even alive).
I wonder if the games would be more interesting if Civ V had a kind of blue shell like Mario Kart, a feature or mechanic made with the only purpose of harming the one who is winning.
One can argue that Autocracy and Scholars in Residence are made to power up the civilizations that are behind, but these come way too late in the game. Nukes also don't qualify as blue shells because the leading players can have them too (and will probably have them first).
What do you guys think?