Good morning!
So I played with the sandals a little more and have 2 more ideas to share. Honest opinions preferred, as usual.

Suggestions are good, too. I took photos of the shoes alone, and on my nasty foot (please excuse my bright orange nail polish) - so we can see how it would look worn.
#1: I took the pair from yesterday and snipped off the ends of the ribbons, leaving just frayed knots. I think I would have to use a spray glue on these to keep them from untying, if I went with this option. (Suggestions here helpful.)

#2: I took a new pair and simply wrapped the straps with the green ribbon (same color as the BM's dresses). Then I glued a few sparklies on in the center, which successfully covered up the little gap in the center between the 2 ribbons I used.