Oh, I was already in the boat of 'dual-wielding shouldn't happen' simply because the spec doesn't incorporate anything relating to dual-wielding.
I was merely wondering why the Landsknecht approach (sacrificing (some) survivability for damage in a vanguard position) was superior.
It's true that I'm stuck in the 'tanks should defend, healers should heal and DPS should kill stuff'-design. If tanks are out-damaging the damage dealers, then the role of DPS becomes effectively null. It's simply bad for damage dealers, who've specialized in dealing damage, and dedicated their abilities and focus to this end, to be outplayed in their own field by someone that isn't even IN their field.
If the fights demand a higher emphasis on tank DPS, then personally, I really disagree with the encounters...
Anyway; I didn't exactly needed convincing... Merely an explanation.