I'm liking your camera idea there, especially since it's something I've thought of a few times. :P
If you want something designed for Spartan use, then try to make it something completely out of the ordinary, and maybe a little far-fetched. If you're not thinking of adding this new feature into gameplay, maybe you could add a launcher that shoots a little gizmo that's connected to the Spartan's helmet, and sends him/her video feed, motion tracking, etc... from where it landed. This way, the Spartan could shoot this thingy into an enemy base or something, and then get valuable information from it.
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