99% of my quilt clients with embroidery on the front or back of the quilt get quilting through the embroidery. Doing so "includes" the embroidery pattern or fonts rather than setting it apart from the quilt by echoing. Make you 2 sample patchs of embroidery, maybe a 4x4, exactly alike, adding batting and back. Sew through the embroidery on one with your regular machine and let the other be sewn with a border around it with the sewing machine. Then be safe and ask your friend or client which they prefer. My personal preference is to quilt through it. Maybe not a much as other areas of the quilt, but include the embroidery.