Thought I would share my experience in case it is helpful to anyone.
I finally got through on the 7866 number after redialing for around an hour. CM picked up right away once the call went through.
My stay was Aug 9-15 at YC Garden View. He confirmed that, indeed, the YC would not be open by that date. He initially tried moving us to CR, Poly or BCV but there was no availability at any of those. He remarked that my dates were "a popular week" (this was a rescheduled move from my original early June dates).
Ended up with 3 options: Deluxe studio at Coppercreek Villas, Deluxe studio at Animal Kingdom (can't remember which DVC building but it was a safari view), or deluxe studio lake view at Bay Lake Tower. I chose Bay Lake Tower.
My original reservation at YC was with the Fun/Sun discount. This move to BLT Lake view was an additional $1500. He initially just quoted me the new package price like he was just providing the information to me. I have a feeling that if I had not said anything he would have just booked me and expected me to pay that difference. I said, "Now, I don't have to pay that price difference, do I? " He then said "Hmmmm, well let's see that is about a $1500 price difference......tell you what....how about I get you some price protection?" I said, "Yes, please" then he applied the price protection to my new resort.
So, nice upgrade although, I love YC for the location to DHS and Epcot, but this lake view sounds nice too. Just wanted to make sure you all know to press them for the price protection as they seem all too happy to have you pay the difference if you don't know better.