There are two types of FMQ foot. One type "hops" at each stitch and one type glides along the fabric. The type that came with your machine is likely the hopping type. I also experienced a big change in my skill level when I got a gliding foot. It removes the little jerky motions that the hop creates.
I looked on Amazon and Brother does make a quilting foot if you ever decide you are ready to invest in one.
Watson