playing Devil's Advocate here...but why are we acting like there is any amount of difficulty to running behind a mob after activating SA?
the drawback to /THF is not "mobs turn/hate bounces around too fast nowadays to land SA on," it's just that there are better options for either DoT (/WAR), survivability (/DNC) or both in one package (/NIN).
I personally have fallen in love with /DNC for Abyssea NMs; healing waltz is a lifesaver when Silence or Petro come around, especially if you have limited healers in the party or alliance. In most of these situations, there is a MNK, NIN or THF there to tank, which means I'm probably not doing much by way of melee damage (meaning I'm cool with trading in Utsusemi and a DW tier for some of the utility that /DNC offers to me).
I think it's more in XP parties. As I said, with big NM's (Isgenbind, Glavoid, few others off the top of my head) - THF is great. You can dump hate on the tank and the mob isn't really spinning.
In an XP party - the mobs spin, and most of the time die, before you get a chance to SA/TA anything (well, TA maybe) - and if you can't get that spike damage, it pretty much makes /thf useless, doesn't it.
I think, and will admit, my biggest issue with /dnc, is that I have DNC 90, and I hate having a watered down version of it. I'm also very much, a melee BLU. I love to wade in there, swords swinging and casting spells in the thick of things. Working on my Almace... that's pretty much what it's going to evolve into.
And, really the best for that is /nin. Besides, I'm wandering in there, firing off CdC SSC's - I'm tanking, and I'm not paying attention to someone else being petrified ;)
As for /dnc and solo - I will agree Sang blade is a better HP/TP ratio and it does damage (against most things) - but /dnc is more than just cures. It's eva bonus, samba's, steps and the like. Further more, Sang only works if you have 100% +TP. CW's work with a lot less, and when things go pear shaped (which they do) - it's also an instant cure. When you don't have the TP for a sang. When you can't take the time to cast a spell, that instant 300hp or so, will save your life.
90 BLU, PUP, DNC, THF, COR & BRD.... yes, I finally finished BRD to 90....
I once ate the soul of a MNK
It tasted like chocolate.