How difficult might it be to change resorts?

We are hoping for free dining (yes I know it is not "free") but it still is cheaper than having to pay for DDP out of pocket, but if it is not offered or not offered when we can go, we are most likely going to downgrade to a value resort (Pop) from a mod (CBR). Would it be difficult to change the resorts?

If it helps, if we downgrade rooms because we have to pay for DDP out of pocket, it will save around $500...

Also this is our 1st ever family trip & will probably be the last one for a couple of years (DH and I are trying to expand a family & don't to travel if I am expecting or with infants)

The poll is about whether we should say forget it and stay in a mod no matter what or just down grade to a value