There's very little anyone could do about it unless they bought a new camera that auto-focuses faster.
The 'blurring' is used for switching camera angles so that the switch is as aesthetically pleasing as possible (Dana cuts the footage so that when it cuts to the different view, it is in the process of re-focusing, which is why it's blurry). But the camera also needs to re-focus itself each and every time it zooms in or out and there's nothing the cameraman can do about it. Whenever the camera zooms in/out on something, the camera lens needs to re-adjust itself to that specific zoom level. The blurring is the visual product of the camera lens automatically focusing themselves. So unless you never want the camera to zoom in or out
, the blurring is just a natural effect of the camera zooming in or out and a 'necessary evil', if you will. But I still think it's cool