I'm looking forward to the sequel already. Then we'll have no vision modes at all and have to stumple around in the dark, just like any other ordinary human. But hey, that increases the challenge so it's fun. Then in the game after that, we'll start bare handed, with no weapons whatsoever and have to find our wristblades on the way, while we're being hunted by humans and aliens. Awesome.
Now stop justifying that crap. We had both vision modes from the start in the previous 2 games. The vision modes were in the demo. But for some braindead reason they decided to change it at last minute and have us look for a ancient mask that is also ugly as sin.