Please just keep checking. I booked FD when it opened and "had' to choose CSR. I patiently checked the site every few days and about 2 weeks later was able to switch to our first choice, CBR. As mentioned, other people will cancel as the dates get closer.
We are staying 12/21-12/28. If there were to be a room discount it would at most take 30% off of 12/21 and the rest would be rack rate. This would save me $100.
Free Dining is saving us $1680. Be persistent.
Is Free Dining worth it? Yes. For us.
K
PS: I can't figure out how to change my ticker to CBR. Oh well.