Overpower it? - Maybe it gets too unfair towards the zombies, if you redeem with the saw or get the saw when camping in a tube, tunnel etc. You need remember, the game needs to challenge you, so if we make everything too overpowered and so on, ppl will thing it's 1. too easy 2. very unfair towards the undead 3. unfair towards humans who wants to advance in order to get a new weapon.