Just discussed with this with Scott Gustin on my podcast.
I went with October 1st as a Before/After date, even though I'm aware that that the masses think it will be earlier. If we have learned anything in the last few years, Accounting and Marketing shouldn't be ignored with making these predictions. October 1st the start of new fiscal year. Of course summer bookings will be softer so a push to have TBA done sooner does make sense.
If they are truly going to open TBA on both costs, WDW version should be 5-6 months ahead of DL just from a closure perspective. If so, a June WDW/December DLP might fit nicely. Still, this would be a faster turnaround from Malestrom to Frozen Ever After IIRC.
In terms of your VQ point, I kind of doubt it unless they move 7DMT to Genie+.