As far as offers of moves are concerned, I saw an email from a TA when they announced the dates of the DVC resorts opening, that basically said people with reservations during the period that resorts were still closed would be offered a “take it or leave it” alternative at a DVC resort or FW cabin for a specific date.
I think if you accept that you get it for free. If you try and alter the dates you will normally be charged the extra.
The problem they have is that no other resorts have had opening dates announced, so for now the only options are DVC or the cabins at FW.
Plus they only have a plentiful supply of rooms they can use within a rolling 60 day window, when they can use any available DVC room that hasn’t been booked, in other words take it from the DVC inventory. Right now, that would be up until Aug 11th.
Beyond that they can only use “their own” 2-3% of rooms.
Until other resorts have an opening date announced, availability will be harder as time goes on. And for the moment DVC “Fall Frenzy” is still happening, people aren’t moving their Fall dates just now. I’ve read of one person who had 2 people booked at POP who got. GV (3-bed) at SSR, suggesting availability is getting tough.
They will have to open up other resorts at some point, and I suspect it will be sometime in August or September. When those are announced, they’ll start moving people there. (And those will likely be the other deluxe resorts that have a shared DVC component. Which is where this “only deluxe resorts are opening” stems from. It’s probably true for a while, but only until rooms run out elsewhere).
If you don’t want a DVC room you’ll have to cancel and then try to re-book. BUT if you do that, then you’ll be behind people with reservations at the resorts that stay closed for longer.