Note that snubs can't actually see more in 3rd person. Note carefully the edge of your view and it is the same in either 1st or 3rd. 3rd person does not widen your view. I realize that doesn't make any sense, but I did try this multiple times to be sure.
However, 3rd person is much better for snub combat as you have a better chance to see and dodge mines. And you can also tell where incoming fire is coming from more easily.