If it isn't hardcoded, I'd like to suggest that poisons be able to be applied to blunt weapons.
I know that EFU isn't aiming for realism, but still I kinda like that blunt-weapons has this weakness to them. They do have other advantages to slashing and piercing weapons.
It could make sense if some rare blunt weapons were able to apply poison if they had spikes attached to them, like the morningstar.
Poisoning a weapon is such a niche stratagem it doesn't really need more barriers. Let the thugs slick their warmace flanges with spider venom.