I know this isn't a popular subject nor will my stance be on the subject but it's completely necessary.
The fact that bayonets do a massive amount of damage to where they can one-shot or two-shot almost every target shows for a lack of melee skill. All it takes is for one mistake in the melee game of a swordsman or axeman to die, where as any person used a bayonet against a sword or axe, or even a club can make many mistakes and laugh off the damage.
Not to mention they have significant reach to almost every other weapon.
I believe the Bayonet needs a significant damage nerf, or there needs to be a buff to most other melee weapons to justify the damage.