sorry for double posting but ive got another point and a text limit.
anyway, about the situational awareness (in respect to real life). close your eyes and walk into a room. now once your in the middle of it open your eyes, but DONT look around, only in front of you. not take a step back, to the right and left and every which way but forward. if its a room you dont know your probably going to trip over things.
fps's work more realisticly in that way because like in real life you have to know whats behind you and around you. while prepherial vision is there the fact is the brain ONLY concentrates on what your concentrating on, all other objects are blurred out because they arent what the brain needs to concentrate on. during a heated firefight some things MIGHT be in your prepherial vision but its not what your concentrating on so your likely going to be unaware that its there unless you noticed it earlier.
nothing wrong with tps's though, but imo they are more unrealistic in a way and less immersive.