The possible fire problem was on older Ford products that used a faulty cruise control deactivation switch. If you are really unlucky, the switch will leak a little brake fluid, and if it manages to short out at the same time, it could potentially cause a fire.
If you think your 2008's cruise control is weird feeling now, wait till you get a tuner installed. Each time you hit the button, it tries to accelerate by 1mph (which is fine), but it tries to accelerate that 1mph by using 100% of it's throttle. It's a very exaggerated version of what you have now.