Yes and beside historical reality in game balance wise bayonet is simply overpowered and this is for me a game breaker as this makes all non bayonet folks rubbish.
I would not make the claim that the bayonet is overpowered, since the bayonet should be the baseline for melee combat. Swords may need a bit of a buff, sure, but the way to go about it is not to nerf the bayonet.
I wouldn't have agreed with you a few days ago,but I think the "pro bayoneters" have been getting back on their game, I've been seeing single men dispatch 8+ people in combat by using spin tricks and overhead stabs.. just nicking people with the tip of their bayonet and yet delivering blows that can kill both the victim, and the victims entire extended family in one nick on the tip.
The problem here isn't the bayonet though, since I think most people that got killed by the lone guy were armed with bayonets too, which therefore means that the incident in no way or form is indicative of the performance of bayonets compared to other weapons.
Furthermore, that issue may have as much to do with wierd hitboxed and hanging stabs as with bayonet damage.
I think if bayonets just did a reasonable (thats the key word here) amount of damage of maybe 30-40 (instead of the current 45) then bayonets would still be a viable combat choice, but they wouldn't be the best combat choice as they are now.
Keep in mind that the bayonet currently delivers an excess volume of damage. Excess. (45)
At 35 damage you'd still be completely capable of delivering lethal blows with the bayonet if you had a reasonable speed bonus and it'd still fair well against a sword. The amount of damage a sword does currently is fine, but the bayonet (possibly pikes, too) deliver too much damage, far more damage than it needs to.
Nerfing bayonets is not really the way to go about things though. Changing it so that you need to have on avarage 2-3 stabs to kill someone will just be frustrating, as well as move power in favour of being many instead of being good at the game. Neither of which are desirable.