I guess it depends what you mean when you say competitive. Can you have a game with random leaders on a crap MP map like fractal and still have everyone play to win? Sure. However not even the best will be able to overcome some of the things that would happen. Could you have such settings and then reasonably claim the winner is the best player? Not a chance. Civ's community is one of the greatest things about it. There are precious few forums that can even kind of sort of come close to CFC in terms of being active/reasonable/etc. I admit the existence of this community has been a major factor in me playing the game for so long.