While I may risk being called a whiner should I continue to complain about 4e DnD, Our last game did highlight a major flaw in the game as I see it.  When inter-party conflict began, there was no real way for most characters to intervene effectively.  Now I will be the first to admit that I remain unaware of any rules which allow for subdual or non-lethal fighting apart from the rule on p295 of the player's handbook which allows you to designate a "killed" opponent as merely unconscious, and you don't have to even declare that intent until the creature is effectively deceased!  Obviously, this will make bar brawls far more costly in resources for any involved party member, since there is no way to recover that damage more rapidly or easily than if you had taken the same damage from being hacked at with an axe.