One other thought: If an owner at WKORV enrolls their week into DP, does that mean that owner will compete with other resort owners (e.g. Marriott, WKV) if they want to reserve at WKORV?
If this is true, then a lot of premier inventory will stay in Vistana because WKORV and OF owners will want priority access to inventory rather than deposit their week in DP and compete with MVC. MVC cannot strip out the weeks if not deposited into DP. And because I think it must be deposited in advance for the year, most owners will likely stick with status quo and if plans change last minute they can cancel and trade in SOs.
If the above is true, then even enrolled retail owners may not necessarily deposit into DPs. As
@dioxide45 indicated, this will look a lot like MOC Lahaina and Napili unenrolled. The difference with Vistana Mandatory vs. MVC is that such owners still have an option to trade SOs and don't need to decide in advance of the year whereas MVC owners don't have that option.
Unless I knew I wanted to trade into specific MVC property, why would I deposit an expensive unit? Even then, why would an owner want to risk competing with all MVC owners to get the unit I want when I can rent our VOI for $5000 a week and then use the money to rent the exact MVC unit I want. (more hassle but...)