Motion blur activates with far too little angular velocity. This means that even with relatively small movements the blur activates. Because of an unrelated bug, #0000761, this the workaround (using a dead zone) impractical.
The ability to tune the degree of motion blurring effects should be presented to the player, including the ability to turn it off completely without the ham-fisted approach of disabling all post-processing effects.
I should note that eyes are not cameras, and we do not experience motion blur to the degree presented... blur while moving your point of aim is a very gimmicky item that is far to prevalent these days.
+1
The ability to greatly reduce the amount of motion blur present and without disabling all post processing effects is a must.
The amount of blur makes all holographic sights useless because they blur too fast and you lose your target.
First of all it looks awful, second it's done only on camera level - only camera movement produces motion blur not the actual spatial movement of objects in frame and finally the third it's too strong and creates a perceptive frame drop. I would say remove it completely until you have something way better and properly implemented. We had the same ugly motion blur in Arma2, that's why almost nobody was using post-processes at all, except the ones who found a way to disable it in configs.