Being from the OFP days myself I have to agree, even though I have personally stopped using the feature, seeing it in there would carry on the legacy of the older titles. I say yay~

I'm also hoping we could see this be added officially. While it might be debatable how much "immersion" this adds to the game, I can't help but to find the added mechanical depth helps translate the difficulty firing and controlling a weapon is in a virtual space. The added benefit of a more static camera in combat is also nice for motion sickness in my opinion. It's been a loved feature for so long, and while few may use it, it doesn't feel right to be excluded from the game and feels like a step backwards without it.