Well, not ALL things need testing
There are basic principles of game theory that are considered.
Feedback: a gamer needs a valid response to his action. Thats why the hit-detection is there. Usually, more than one form of feedback. Why we also have kill messages
Arguably, you could do without one, but according to game theory, expect frustration and constant uncertainty aka, flame-quit
I'd say a robust UI in the form of a custom FH2 Menu or @ least, the external toolkit with various degrees of immersive HUD from simply no-hit-detection, dash bar etc, to no crosshair etc.
And then, a server employing that say once or twice a week, with option of taking it on more times, depending polls etc.