That first clicker is designed to take more than one shot, which threw me off of the mechanic. That's the arbitrary stuff that really got to me while playing it.
Clickers always take 2 bow shots. Anything else other than bloaters though does die if the shot is a sneak attack.
The most powerful aspect of the bow is that it's the only ranged weapon that doesn't make much noise.
I feel that one of the upgrade for the 9mm pistol should have been a 2 point Noise Reduction.
The 9mm is the weakest gun in the game and it would have made it viable later in the game to give it a [-35%] [-70%] noise upgrade.
As it stands now, you never use it unless every other gun is out of ammo.