I don't like the looks of STD either. I would run my walking foot along the seam line usually about 1/4" away from seam. Makes a nice look. I would not quilt anything else in the stripes. For the star area I would make a straight line across and down between the stars. This is what I would do if it were mine. I would not want to put a lot of quilting anywhere else. For the border I would space line every 1" or so down the length.
It is beautiful. We have a Grandson who is a Deputy Sheriff. He would love this.
Your quilt your way, of course.