TES is meant to be played in either perspective. I dislike playing exclusively in first-person mode. In Morrowind and Oblivion, I would only use first-person to line my crosshairs up with a specific item I was trying to pick up, or to get a closer look at things, nothing more. And I would like to keep it that way.
I have a harder time roleplaying if I'm forced to play in first-person. I am not my character.
but thats the reason for First Person! for you to be entirely your characters, to see what hes seeing, and obviously the TES series is all about liberty, even if it is liberty to play as you wish, or first person or third person, and for that, the third person shoudn't be only a add on so players can see how they look, i definitly will use third person view, just to look badass while 'walking'(not running, like if i was playing) through a epic mountain or place, just to look completely like" im the dragonborn..... i kick ass..." but yea 85% of gameplay will be fps (ftw)