Your quilt is beautiful. That black and white is so crisp. I do not think the seams are particularly noticeable because quilts have seams. However, if they bother you they must be addressed. Another alternative would be to use a fusible batting and adhere a plain white fabric to the front of it and sandwich your quilt with that using Elmer's glue, basting or pins that you normally use. Then, when you wash it prior to giving it to your nephew and wife, all the glue washes away.