It is always a better deal to take the FD when staying at a Value resort.
The room-only discount for Values right now is 15%. For the nights you are there, POP averages $114/night, so the 15% off would be approx. $120. The QS Dining plan runs $39.64 per night- 7 nights would be about $275 per person- a total of $550.
That's a big difference- Free Dining is a no-brainer!!