Scythes are already in the game though, as a
sub-tool for BTN like how they are meant to be (scythes are an agricultural tool used for reaping wheat and grains). Or if you want a scythe weapon,
Edda's scythe from PotD is in the game anyway for multiple Jobs (bought on the Mogstation), so I don't think you will ever see a specific scythe using DoW class added (to say nothing of even FFXI's use of it being only added as an afterthought in a patch and was not part of the DRK Job originally by default, given DRK has traditionally been a sword/great sword user in past FF games like FFXI and even it's origin in FFII).