The fact that the damage on this WS is non-elemental gives it niche uses. If you really wanted a WS with good damage, CDC has been available for months now.
If you wanted a WS with good damage, VS, Blade: Hi, Ukkos, etc. have been available, but they still gave those weapon types a decent merited WS.
For blu, the non-elemental property is even less useful than it is for other jobs, since we can already dance around physical resistances with different physical damage types, and nukes. And even for pld, what relevant content is this actually useful for? Prime avatars? Farming fire elementals to fund your gungnir?
It really blows my mind that they gave such a giant attack penalty on a WS to jobs that already have crappy attack, and on a WS modified by MND no less. Aside from twilight gear for pld, you give up massive amounts of str/dex/atk/acc to gear for MND in the first place.