I recommend Berserker's to newer players because if they care enough to ask how to improve their play they're likely the sort who can make the most of the advice. Do you really think that the players you're describing are the ones who bothered to research how to maximize their potential? I don't think they are.
In my experience, those who can't stay on their feet are the ones who are either lagging heavily, keyboard-turners, or have no idea how or what to dodge. Gear doesn't make this sort of difference in a game so heavily focused on damage that must be avoided, so a player who is surviving in Knight's is doing exactly what they'd be doing in Berserker's: positioning themselves to survive.