The dress looks great, and with a neckline like it is atm it's hard to pull off well. You're doing a great job.!
This is just a suggestion. I am loving the dress, and not sure how it ties. To me It looks as if the top next/boob bit crosses over you at the front, then the back then around your waist and ties at the back. What if you were to uncross the front bit, and twist the "ties" Into yourself, so they form a little more of a tie, then put them directly over your shoulders (kinda like a cowl neck but not) then cross it over on your back and bring it around the front and tie at the back?
It would create a more open flowing look to the dress while still keeping the Grecian inspired theme, (especially with the twisted side straps)
I'd go with a Grecian inspired up do as well, somehow incorporating pearls into your hair and drop pearl earrings too.!
I'd love to see what you decide to do.... It would be a shame not to wear such a well made dress.
ETA. I found a pic whilst perusing craftster that explains the strap front bit better than my words.!
I edited her face cause I felt a bit funny reposting someone's picture without their permission.....
The straps are just how I was explaining them before.