Really, Barnett, hawk or Matthews/Thompson and bigby/collins are going to see these coverage responsibilites about 90% of the time, kampman will drop into zone occasionally and man very rarely, and spend most of the time pass russing.
I think people are acting as if Kampman is going to be the only LB in the game, when in fact there will be 4 guys who will share coverage responsibilites, kampman of course seeing the least amount, even in that case i dont see it as being too predictable, you can still mix up which of the other 3 LBs is going to blitz, all or none, any combination, drop kampman into zone, etc. Also kampman has done pretty well even when the other team knew exactly what he was doing(IE: 2008 with every offensive line focusing exlusively on him).
Rushing 3 + Kamp isnt even considered a blitz, so its not like there is some glaring coverage weakness when Kamp is rushing the passer.
I can virtually garuntee it will be enough of a surprise when Kampman DOES drop into coverage, that it will be hard to focus on taking advantage, its not like he's going to be playing nickleback where they can just take shot after shot on him.