Seriously how did that get past your play testers Turbine? it looks .... I haven't the proper words... It slaps my immersion in the face and grabs on and tries to do dirty things to my eye holes; against their will!
No but seriously it looks really bad
Especially when moving, when the lack of any flowing or physics behavour makes it stand out like a sore thumb, it literally looks like a South Park animator drew a Pig Pen effect cut it out and slapped the cray paper cutout over top of the character that's holding the weapon.
It's bad enough we have giant Final Fantasy knifes and a two handed version of Rambo's Survival knife. And that these huge heavy weapons flap about and wave around like the animators had the mocap model holding a card board sword.