You need to be able to run while changing weapon. You need to be able interrupt any animation and move. So many times I was killed when I was changing weapon.....or while i was healing my self. And you can't do a shit until animation ends. It destroys whole moving dynamic
Give me coule days and I'll uplowd video wher i will run and change my weapons. No matter what r u doing, in real life ...when you are under fire
....you'll run and jump like a deer!!!