Just to bring this back to "Shayne Spoilers..."
I think there is a possibility that we've not seen FR hands because the final two are Shayne and Amanda. The contrast in skin tone and height is too great to disguise.
Chelsea and Amanda as F2 would be fun for Fleiss since we've already had so many instances of confusion between the two. Chelsea and Shayne are a bit closer in height and coloring and I think Fleiss might throw it out there if it were the two of them.
But Shayne and Amanda? Not so much.