Optional Bayonet certs for heavy melee

[berzerkerking]

Because melee will take additional knife equip time, what if there was a bayonet sidegrade that allowed for stabbing kills but could be countered by someone with a knife and a deflection skill. This would be useful for close range situations, without needing to sneak up behind your opponent. At the highest mastery of the knife tree this would be available.
Tell me your thoughts and I will do my best to defend my Idea