Crouch and Run and Run and Crouch
Since the Vita’s dual analogs don’t have clicky-sticks like its console counterpart, the run toggle had to find a new home on the face buttons. With so many different functions available to the player this unfortunately means that some buttons are dual purpose, as is the case with the crouch and run toggle. While moving the button puts the player in a sprint, but if hit while stationary the player will fall to their knees.
For the most part this isn’t particularly aggravating, but it means that in the few instances where you decide to sprint out of a situation and hit the button before taking your first step, you’ll wind up crawling away with an ass full of lead. There is a back-touch alternative that’s a little more comfortable but as the default option, this isn’t ideal.