I'd never work with this combat system. Most of the time, you're fighting at least 4 enemies. And they will surround you easily. The only way to keep track of a battle is to have a zoomed out 3rd person camera. Not to mention that it'd be really difficult to translate his rolls and dodges in first person. It'd just be a huge mess.
Not for fighting, I wish all games offered a simple first person view, even where you can't even move while in that view. They had that even in Zelda 64 ffs. There's no need to worry about fidelity, it's clear that most 3rd person games coming out now still hold up in first person shots. Please devs.