You should tell the LA'er about the fray check. If it were me, I'd do an echo stitch around the outside of the applique..that will make the applique "pop".Depending on how heavily it is applied..it may not be possible to stitch along the seam inside each intersection, but they could do some sort of design that would highlight the applique, stitch 90% of it down, without going all the way out to the edges where the fray check is. It is doable.