Wow, I wish I had waited and not played through most of Leon A in third-person now.
It's certainly not perfect, but it works far better than I expected. Turning off the camera shake and FOV multiplier (scaling the FOV for actions like bringing up a weapon) almost looks like it was made to be a first-person game.
I found that the FOV was too low on my ultrawide monitor at the maximum value with the multiplier set to 0 though, as it maxes out at 100°. The fix for that was to set the multiplier to 2 and FOV offset to around -50, which ended up back at ~110° when setting the multiplier to 0 again.
The game's TAA does not handle first-person well at all though - there's significant amounts of ghosting:
And it
really highlights the issues with the keyboard and mouse controls, such as the need for 1:1/raw mouse input, when switching to first-person. I thought it was bad enough in third-person before.
The mod does nothing to change the game's movement either, so you're stuck with animation priority over input priority, which feels even worse in first-person.
One funny thing I noticed is that the player's head disappears from shadows, as the mod is hiding the mesh that the camera is attached to.
That's not the way it was meant to be played.
Who cares? It's how I'd prefer to play it.