I'll stick my neck out. Are you paying to stay at Scrub or using points? If you're paying, I'd extend your time at Sugar Mill and cut back the days at Scrub. Or look into spending time on Virgin Gorda, maybe Guavaberry Spring Bay. On VG you'll want to go to the Baths, Hog Heaven, Coco Maya and some of the wonderful beaches.

Waiting to hear other suggestions.