It worked well in Vietcong, since the weapon would automatically move out the way to avoid hitting things. On the other hand... it was TERRIBLE in the UT99 mod Infiltration. In that, if the weapon collided with something, it stopped you dead. Yes that's right... if you were aiming out a window with a rifle, and went to turn around... the gun barrel would hit on the window edge and you couldn't turn around until you either backed out of the window frame or stopped aiming the weapon.
It made even basic movement in that mod often frustrating and annoying. But I don't expect to see the devs add something like that to RO. They seem to think that something easy to do irl should be easy to do ingame. And I agree