The creator can just make it subtle in order for the gameplay to still be playable but I can see where you're coming from but since I suggested about the ability to see the character's body that we are controlling which opens up animations such as opening doors and using the vending machine, the most simplest thing I can think of is camera bobbing. Right now it looks like the camera is just levitating like there is no walking animation. Like you said, "simple." I may have suggested too much to the point where camera movement is just an unnecessary gimmick as you may have read from mine. You're not wrong about motion blur though.