DNC, and dagger jobs in general, are the last DD jobs that need to see any nerfs. After nearly a year of fun and usefulness, all THFs and DNCs will be shocked back to cold reality when we step outside Abyssea. We'll be banished back to the Mog House only to emerge and occasionally poke an NM or two with our Thief's Knife, Assassin's Armlets, and Raider's Poulaines +2.
I agree completely with RaenRyong, and I believe that THF could desperately use some tweaks. Atma of the Razed Ruins, Atma of the Gnarled Horn, and Atma of the Apocalypse combined essentially 'fixed' THF (and DNC), and it would be nice if some of those boosts were permanently rolled into THF. Aside from TH and enmity shifting, THF should be the king of critical hits. But we're not. We're the king of standing around bored.
I don't want overpower THF to the point where it becomes the next SAM, MNK, or WAR, but we'd appreciate the opportunity to actually play the job we enjoy rather than poke a mob once for TH, put on our dunce hat, and go sit in the corner. THF could really use more boosts to Critical Attack Rate, Critical Attack Bonus Damage, and at least one more tier of the Triple Attack Job Trait. THF's current JAs, with the exception of Collaborator/Accomplice, are too passive to make any substantive difference during the course of battle.