First of all, my idea is having this has an option so you can still keep pressing a button if you like and second, from what i´ve seen in a video of ESF:F, you can teleport while swooping so you wont use the "walk?" that much as you did in previous versions, the only time you will probably use it is when on the ground running to conserve KI and no, im not lazy, for some people it becomes a lot more practical not to keep a button pressed 99% of the match to move in any direction.
And btw i would like to add something to my suggestion, my idea is that you could invert the button, meaning you have lets say shift to swoop , if you invert it you will now swoop fast while you are not pressing shift and "walk" whenever you keep pressing it, basically what counterstrike does.