By pulsing the pump with a controller, fast and slow flow will collide and create a broader pulsed flow, you could change the outlet to a 6205.130, this will make the flow wider and shorter. I am not sure why the flow having a defined direction is a bad thing, typically that is the goal of a powerhead, to create a directional current. It should be sufficiently broad and without high pressure shearing forces as is. In most reef zones the flow would have at least as much force and direction.