It's not only swords, the staff in the back looks absolutely STUPID.
Two handed weapons, especially the long sticks (staff and spears and halberd) should ALWAYS be in one hand or two, not attached to back PERIOD. It's sooo silly.
Artists, please stop being lazy and work a little.
Talking about lazyness ... have you tryed to simply click Tab?
I just tried.
And you know what?
Right when I decide to cast a spell the staff goes back to the back.
Is it some kind of homage to World of Warcraft or just "We don't have time to make spellcasting animation with staff/weapon in one hand, we'll just make the staff magnetically stick to the back"?
*It certainly is not because of DnD 5e rules : you need only ONE free hand to cast spells with somatic components.