I'm not sure what will happen. If you purchased a pass based on the published block out dates and they changed you to a different pass with different block out dates, I think they would have to make that right. (Plus adding in the photopass)
But, I think it would be a gamble for future years where they have not published the block out dates.
I compared the published block out dates on the Gold pass (30) vs the published dates on the Sorcerer Pass (18) and discovered there are actually fewer block out dates on the Sorcerer Pass.
The Gold pass: Dec 17-Jan1 and Apr 9-22
The Sorcerer: Nov 24-27 and Dec 18-31
I'm actually a little surprised Spring Break is not blocked off on the Sorcerer since it seems to be a really busy time.