I have to agree with Nebo on his last comment certainly with some aspects. In a meripo, it's likely that a thf can top the parse. Especially if you're fighting birds. This is mainly because of Trick attack, and what was mentioned earlier about DDs not wanting hate or they can't maximise their damage potential. If a war uses berserk, then you trick attack him, chances are he'll have to cancel berserk, unless they feel they can ride seigan until the mob is dead. Even in this case, the WAR has to use 2 JAs, missing a swing, and taking longer to reach their next ws.
The point about the job being about the player, not the job itself is also very valid. If you're fighting NMs with a SAM that thinks he's god (there are a few about, trust me) they like to run in with all their DD buffs on, sekkanokki fragmentation, meditate light or whatever, then they spend the next 5 mins weakened. Damage potential was high, but actual damage output was low XD. The THF however, just plods along, WSing every 30 secs or whatever, fully capable of taking a few punches should we pull hate (which we would if we were fast enough to save the sam with accomplice XD).
And the gear section has me down to a T. I use ~60 gear slots on thf, and tbh I'd probably out damage my own war (lol full perle) over time.
When I choose jobs for events, every DD job has to be able to take a few hits should the need arise (ie. knows how to use seigan, not just full-time hasso).
However this thread is kind of being derailed now. Yes being able to use 'stances' or SA/TA outside of the current positional requirements would allow us to more frequently hit our damage potential, and stop me from shouting at my laptop when people move in a party.