@Roxlimn: Good for you that you are enjoying the game! I do seriously envy you.
However, I have played Civ5 and read enough threads to know that the problem is not just that the AI is weak or that there is this one exploit that people can take advantage of to beat Deity. It's that there are so many ways to beat the game in whatever way you want that a fix would require a major overhaul of the game, not just some minor recalibration. Sure, ICS is an easy way for victory if done right, but an experienced player should have no problem to beat Civ5 Deity even with a small empire.
And yet this is still not the main issue imo. My biggest problem with Civ5 is that not only is the game easy to beat, but it is boring, too, because the buildings are so 1-dimensional that at every point of the game, it is rather obvious what to do (need happiness -> build happiness buildings, etc.).
And while this may be fixed in the future, I will still not be playing it, as I just don't have the patience to play a turn for 30 seconds and then wait another 30+ just for the next turn to load. The game is broken at a fundamental level, and looking at the final state of Civ3 and Civ4 (both of which have some major flaws that were never fixed), I won't hold my breath waiting for version that I would want to play as much as Civ1-3 (I never liked Civ4, but might give it another shot with AND).
Edit: Ups, while writing this (and watching Big Bang Theory), 2 people wrote basically what I did. Sorry about that.
