Current ability to reconfigure keybinds is very limiting and should never be part of PC game.

Every action needs to have it's own bindable action but you can prebind them to same keys for all I care. Currently I cannot bind prone, stand and crouch to separate keys as there are no actions for those anymore in key config.

Hold breath cannot be bound separately as its bundled with zoom in or something like that. That really is embarrassing for PC title these days and even so based on your previous titles which had very versatile key configuration.