[Kitalrez]

Would it make sense to give other jobs DW, though? Not from a damage standpoint, but from a job/game history standpoint? Akashimo already mentioned DNC and THF. So, let's look at NIN. Why do they have DW in the first place? It was in other games, yes, but it's also in the lore of that job. NIN were supposedly trained so they could fight with whatever hand was free at the moment. Now look at another job you mentioned, RNG. RNG historically isn't a job that trains to use both hands. For instance, Mongolian Horse archers were far more concerned with shooting from a trot or gallop than with being able to shoot lefty. If you had a target on the other side, you'd pivot your torso that way. Same deal today, the marines didn't send me out to the rifle range and expect me to hit a target using either hand. It isn't because they don't value marksmanship, either. Marines pride themselves on being sharpshooters, and if you look at their recruiting materials and boot-camp reading lists they're basically setting infantrymen up to be "sniper lite". Here's your modern-day RNG equivalent, and it's much less concerned with how many different ways you can hit a target than it is with whether you're actually hitting it period.

To that end:

THF can make the case that ambidexterity is rather important to this job. THFs are about misdirection and dexterous movements, this would make sense.

DNC can make the case that they aren't trained to do movements with just one hand. Most ballets do not take place moving only right to left. Neither do more acrobatic modern dances.

MNK could make the case that they already use both hands in attacking, why not let them use clubs the same way?

WAR could make the case that their whole job is based around how many different ways they can hit the mob, they're the master of weapons after all.

The rest of the jobs? Not so much. S-E took a really hard line defining SAM and NIN as being wholly separate jobs, so much of Miyamoto Musashi's work wouldn't fit. Mage jobs and supporters are in the same boat. Neither Knight class seems suited for this, either.

Does it make sense to give them DW itself, though? Would it be more fitting to give them a new ability, (let's call it "Ambidexterity"), that works like DW but is say 1/2 to 3/4 as effective and doesn't stack with DW bonuses, but DW gear is modified to raise if equippable by that job. There would be your bonus, but without discounting the training aspect of NIN lore.


And finally, to Feba... Dear God, no, no it isn't that simple. Just because you have two hands doesn't mean you can be any good with them. I train in Shaolin Kempo Karate, and after purple belt we're allowed to work on weapons training. The first time I learned to use a staff my sensei said to me: "Hmm, you're pretty good with that right handed, try it the other way." At this point, no matter what the weapon the following always happens: within five minutes someone is on the floor, clutching their groin, and making the most horrific noises you've ever heard. Nunchuks, bo-staves, sai, swords, escrima sticks or batons, results are typically similar. Thank god they're all dulled. In attempting to use a bo-staff left handed, I managed to hit myself in the shin, the knee, the groin, both the front and back of my head, and this was with both hands on the actual staff. Let's not go into how badly I wrecked myself trying it one handed. It took me the better part of two months just training exclusively with windmilling the staff on my left side before I could pull it off, and I was considered a fast learner.

Your brain will also work against you. You may pick up that weapon in the off hand, but that just means your brain has to tell your body to use that hand first now. Which takes a split second, compounded by moving muscles that aren't used to moving that way, which takes more split seconds. Sooner or later, you have enough slowing that the attempt to parry that incoming sword thrust can only make it to your shoulder or leg in time. Not fatal, but not worth switching hands either.