Take a look at the Movement blend tree for the clean scene. You'll see that the running animations play when the horizontal and forward input parameters are 1. To get your character to walk by default you'll want to replace these animations with the walking animations. The SpeedChange ability should then have a Speed Change Multiplier of 2 so the horizontal and forward input parameters have a value of 2 when running. You can compare your blend tree/ability to the shooter scene as this is the default setup. Also, not directly related, but if you haven't done so already I highly recommend duplicating the clean scene animator controller and assigning that to your character. This will prevent that animator controller from being updated whenever a new third person version comes out.