There is absolutely no drawback to dual-wielding in DKS right, I mean even with your default one point in the skill you get a 5% bonus to attack damage from your main-hand weapon. Adding points simply ramps up the damage in the offhand, from a penalty to a bonus.
I suppose I'm used to the post-BG2 infinity engine games where dual wielding caused significant main-hand penalties when the character was unskilled in the technique.
In DKS the way enchantments stack there's no reason other than personal preference to not use it...
