Idk how I really feel about this thought lol. I use to play XI zoomed in closer to my character but after geting ambushed a bunch of times due to respawn pops or accidental AOEs and just plain not having that peripheral view, I moved my camera angle back in order to compensate for these short comings. I think if they were able to impliment what we as human beings at times take for granted and that's peripheral vision, your idea may be extremely cool to experience!

As for the other reasons to post your thoughts in regards to not seeing your actions basically, it may seem that the overall aspect would be easy to impliment but I think in actuallity, recoding all of that may be more intensive then us non-programmers may believe. I say this only because of other forums/posts I have read not just in XIV or XI but in Aion as well where actual programmers and game designers have always stated, it's more difficult then we think to "easily change" the things we personally would like to see. You're right though, it's not priority but if they could added it and create that sense of peripheral vision so we can "sense" or see those mobs you usually can not, then it could be a neat experience.