The current status quo of this game is dual-wielding above all else for melee damage. I have put together a small bit of information to see how others feel about this compared to 2-handers. When one talks about melee damage, they speak of a few things: accuracy, crit rate, attack speed, damage per swing, number of swings, tp gain and tp feed. Currently, even after the update, dual-wielders win in all but 1 category. Dual-wielder jobs have higher dexterity in gear and thus have higher accuracy and critical hit rate. They hit for, on average, ~60-110% of the damage of a 2-hander per swing (the low end variability in 2-handers on high def mobs is lower than the high end variability of 1-handed swords on the same mobs). They then hit twice per attack round for 1.2-2x the dot of a 2-hander.
The gear for these jobs normally has much higher TA and QA than the gear for 2-handers, meaning they hit even more often. The ws's on dual-wielders get an auto-DA and have higher accuracy due to it. Certain ws's, namely CDC hit harder with low damage and far worse-geared dual-wielder jobs than much better geared 2-handers at a much higher tp. A 2-hander with 250-300+ dmg and higher attack with 2-3x the tp can easily be beaten in damage by a worse-geared dual-wielder using CDC and a sword with 150 or so power at 100 tp. This is seen even more easily on higher defense enemies (namely most enemies people fight currently) since the critical part of the ws allows it to do more damage to higher defense enemies.
The tp buff given to 1-handed weapons (and thus amplified by having dual-wield) allows them to get tp as fast, and sometimes faster due to attack rate than 2-handed jobs. This allows them to ws as fast as 2-handers and many times hit harder in the ws. This tp buff was an ~16-19% free stp buff on low delay weapons and an ~0-1% increase in stp for high delay weapons (poor scythe).
In all, 2-handers hit slower, hit for less damage per attack round, get tp ~same amount, hit for less in weapon skills, are less accurate, miss by default 2x as many ws's even if they have the same accuracy, and have a lower critical rate. The only area they win in is tp feed.
So I ask, "Are 2-handers obsolete?"...