Well, I have to disagree Bluefox, OGR and as a special forces recon unit gave you a technological advantage over the enemy by letting you know they were there but not Pin Point precision silhouette style even behind solid metal objects... I believe that's what Flaw3d meant to say.
Now, I also don't recall being able to turn that option off when playing the campaign. That or I sucked so much that I needed all the help I could get and I left it on but by default.
In the end, FPV or TPV, Full Gadgets or No Gadgets... all we want (or at least I want) is for the Devs to waste as much time making everything else correct, being weapon sounds, ergos (weapons... see CoD as example), difference between bullet penetration, body movements, artificial intelligence (both team mates & enemy... this is extremely necessary for the best gameplay immersion) as they do making the world pretty so when we choose all the different options we find ourselves happy with our decision changes.