I really like this type of mods to experiment with a camera in the first person, although … I must admit that most of the mod I have tried to achieve this, usually give visible problems during the fighting.
When a character makes turns during combat, or rolls on the ground are usually some problematic cases, however I like a lot to alternate during the parts of exploration.
I would like very much, that currently, the AAA video game developer studios, took the habit of implementing the switch for the first person camera and also for the third person camera.
This is one of the customs that I still praise and admire in some Bethesda games like Elder Scrolls or Fallout, The Evil Within 2, and hopefully they would be copied in the future by other studios like CD Project or Bioware.
In addition, this would result in fewer discussions between users who want one or another, opens doors to possible future supports for virtual reality, and facilitates experimentation with programs such as Vorpx.