The quickslot radial menu needs to be changed to allow for continued movement during use. The present system, whereby the character stops dead in his/her tracks the moment the menu is accessed feels horribly clunky and has directly led to a couple of extremely frustrating deaths by zombie for me so far. It's essentially impossible to quickly change to a specific weapon while continuing to move, particularly since quick switching with Y can be unreliable if there's any slight lag.

To replicate: hold D-Pad right while moving.