All T weapons have an amount of risk that goes with using them. Currently the knife is in a good place after receiving a huge buff, Giving the ability to one shot anyone.
The disadvantage of the knife should be the ability to get dna from the bodies, If a T would not like to be caught by the dna scanner there are other T Shop items to prevent such things happening, Such as the decoy and the flare gun.

All T weapons have an amount of risk that goes with using them. Currently the knife is in a good place after receiving a huge buff, Giving the ability to one shot anyone. The disadvantage of the knife should be the ability to get dna from the bodies, If a T would not like to be caught by the dna scanner there are other T Shop items to prevent such things happening, Such as the decoy and the flare gun.