I think all of the appropriate adjectives have already been used. I have been in love with French Braid for a long time but this is the most dramatic one I have ever seen. Congrats on a job WELL done.
You made a gorgeous quilt! I agree with the SID suggestion for the main part and embroidery with the knots. Your design and fabrics totally speak for themselves.
Since time is of the essence, I'd SID on the body of the quilt and then do a cross hatch on the border, using masking tape to mark it out. Absolutely stupendous work!