I’ve always liked the idea of asymmetrical factions as well. It’s fun to think of possible third and fourth factions for NS2…such as a “Protoss” style faction with advanced energy weaponry.
With a stopwatch, ET style mode… you can have any kind of asymmetry you want, and it will be balanced. But of course, its more fun if its offensively biased.
While I’m able to accept mechanics that I don’t like if the other areas of the game appeal to me…I honestly would hate playing the “CoD” faction in your example, due to the iron sights. And I don’t think getting one hit killed is very fun because it punishes aggressiveness and rewards cautious players…which I personally don’t enjoy. We are all molded by the games we played the most. I played a lot of UT99 back in the day…and then I spent all of 2009 in Killzone 2 clan matchea… two games where you have to be aggressive and constantly moving, and both games conditioned me to love long duels while dancing or strafing…as opposed to tactical iron sight shooters. Though, I actually like iron sights in some slow-paced single player games that benefit from the immersion, like Stalker or Fallout New Vegas. I just mainly hate them in fast-paced games and multiplayer…but I recognize it as a completely subjective feeling.