The reason for doing it to Thief's Knife and nothing else is because no other job has had a weapon that is so important for a job that they would actually consider gimping their damage just to use it, even for only one hit. No other job has any weapon outside of Relic/Mythic/Emp that actually gets to be that high in use for any job, even PUPs got an Animator from the T3 Windy NM, but THFs are stuck with this wore down dagger with crap stats, it deserves upgrading for that exact reason. SE seems to make it sound as one of THF's main uses is TH, it is, if its so important to the job though, doesn't it make more sense for them to specifically better the options surrounding it? I agree putting TH on a wep was a stupid idea, but its done, and unless they do make a piece of gear that does not work in conjuncture with the knife, its use will always be there, and unless its upgraded, it will always suck.