Ive been looking at all of the ideas that people have been coming up with for new weapons that could be added, which AFAIK is not likely to happen.

something you could do instead of this is make the crowbar do different things instead or compiles to the damage, like

quad damage/one-hit-kill
ignite
give it massive kickback or recoil (so when you hit a player he flies away)
tranculizer (slows down player)

and you could probably set it up so you can buy it as a powerup with credits...
i dont know if this is any more possible but its an idea