Aside from general polish and game feel, the biggest change I'd make would be to increase the FOV, if not adding it as a setting.
60-100 sounds good.
Tying the FOV to in game actions would greatly increase game feel I think,
So for example when you pull the bow back it zooms in slightly, when you run around it zooms out to emphasise the speed, maybe even push the camera in the direction of movement if you're strafing without aiming.
All tricks to make the player character feel real and physical without really changing gameplay much.