Yes, it is a lot better. It affords you another level of control over the camera, which is good.
As a rule of thumb, you want your shutter speed to be about 2 times what your fps frame rate is for the best results.That part comes down to pure math. And a 1/60th shutter speed allows adequate time for enough light in to strike the sensor and record accurate details of the image you are shooting. The ND 16 filter will open the camera up allowing you to shoot at 1/60th a second in the first place. Those filters do not make your pictures darker. They are designed to progressively open up your camera a few stops at a time as you go from a ND4 to a ND 32 filter, which produces very smooth cinematic effects as it opens up the camera a great deal.
Properly setting your ISO (lower is better), locking in your exposure, and remembering to lock in your white balance, too, are three things you can easily do to reliably capture good photos and video footage every time without running into under or overexposed scenes as you are filming/photographing or having noticeable changes popping up in your white balance messing up what you've shot. And it's best to lock in your white balance using either a neutral gray card (which they sell) or something that is a true white placed in front of the camera to lock the white balance on, every time you switch batteries. You can also use the setting you are shooting at, choosing what you want to emphasize on and locking your white balance on that aspect of the image (i.e., picking the sky over the ground or trees and locking onto that, etc.).