The current climate with throws makes it unfair if you'll have to waste a precious second just to sheathe the weapon after blocking a throw.
It'll have to be optional, and activated by holding the sheathe button(instead of tapping, which'll sheathe it instantly), and it could exist as a "cool" feature like the walk but, in my opinion, it'd be alot cooler if it was slower and with a sliding sound as it slowly sheathes into the holster.