One thing about FPS gameplay... I don't want ironsights in, but if they are going to be there, I'd want perception to affect it a great deal. More specifically the range of vision. In effect, you can shoot from the hip, but at a penalized accuracy where it is quite literally "praying and spraying"; or you can pull the sights on the screen where you have more precise knowledge over where the bullets land (still affected by the governing skill and stat through sway and recoil distortions) but perception affects the range of your sight by providing http://fatigueness.com/wp-content/uploads/BLURRY-VISION-FATIGUE.jpg and http://www.happyfeetformula.com/blog/wp-content/uploads/2013/10/106397123.jpg on enemies and objects at certain distances - also for VATS distances (how ever that thing is made... but that's another story). This to ensure that a halfblind sharpshooter isn't a thing and to keep the stats effective.

I'm all for iron sights. They really help improve the experience as a whole. It only helps a bit when shooting (comparable to Fallout 3), but it does make the experience more real and fleshed out. I doubt they would go back on it from NV. I would be fine with them going back to the old way, but I prefer iron sights.

In my mind that depends on what kind of experience is sought for. If it's a shooter experience, then probably yes (though even then some of the older shooters like the Half Life games and Serious Sam games do a much better job without than some of the new ones with it). If it's an RPG experience, iron sights only clog up the screen and create an illusion where it is expected that you shoot where the sights point, that it is "you" who's aiming when it is (or, is supposed to be) infact the character and you are only illustrated his perspective, and imposing that to the created characters possible disabilities and ineptitudes will create an effect not many appreciate ("Why am I missing when the sights are dead on?"), and going in the middle just does both halfheartedly.

I like iron sights. It's kinda an immersion thing. I liked FO:NV better than FO:3 because of it.