Hey Typhoon! Get to work boy! I want to see some development out of ya.

Yes, Mechwarrior Leagues is pretty much 3PV. I think at one time it must have been open as an option. Of course, some people used it. Because SOME use it, all HAVE to...it's an unfair advantage otw.
1st person view would be best for a sim. However, I hate driving the dang Hummers and trucks in Crysis in 1st person...rather drive in 3rd so I can see better. But the same thing is going to apply there too, so I will just have to suffer, lolz.
Having 3pv available to take screen shots is ok, but you can do the same with camera mode.
Definitely need option to look left, right, rear, up, down. You would expect a mech to have cameras to do that, although in FFP when you look to the side you simply see a bit more area and the side of the cockpit.
edit: playing Crysis thru in Delta Force mode. Vehicle control is different - can't shoot and drive, can't look behind, limited range on torso twist. No freakin rear-view mirror, lol. Anyway, it's not so bad driving in 1st person.