You can't unequip your weapon you always have to have something on. Its funny though in the alpha instructions when you read why the reason is just "The gods forbid it".
I guess thats better than the usual "just please understand/except it." we usually get when they completely fail to be able to justify any extremely obscure concepts or decisions in Japan.
Its a bit more imaginative I guess. You would think you'd default to hand-to-hand just like in ffxi at the least lol
If this "quark" ended up in the final build that'd be a serious lack of imagination, critical thinking, and problem solving. These are factors that should be focused on before making things "High Definition".