Was doing a few rounds last night and I came up with the idea of getting hit with the war club (if not parried) should cause a dizzying effect, like when a fireteam member runs out of stamina. It slows down the fireteam member a bit. Causes gasping for air. Rattles your brain for a bit.
I feel Illfonic really needs to differentiate some of these weapons so Predator players can create different playstyles around them, versus just simply being an unlock on your way to the combistick.

