If you do the premium plan you can probably stay in your same resort room as concurrent, split reservations. I think in this economy they would accomodate that request; so, you really wouldn't be checking out and in again. This would be easier. I will say though I think you get some super benefits doing the platinum plan that I can't resist it. Read on.
If you want the platinum plan and you don't want to stay the whole time at a deluxe then it's more complicated because you have to check-in and out of the resorts which is time consuming. This would be extremely difficult without having a car. It would work best to change resorts if you did it early in the morning before anything really got started/opened. I would actually have a non-park day on day 3 just to relax and get rejuvenated, but I would be doing commando style for the two days on the platinum plan.
Keep in mind this needs to be a Disney package deal; so, you buy a 1 day park ticket at a very high cost. I do believe ( I'll be verifying this for sure)you can upgrade the 1 day tic to more park days; so, I would keep this in mind in my second reservation when getting park tickets. I would probably do a resort only stay if upgrading park tickets.
We take longer trips there; so, I'm actually thinking about starting my trip this way and mid stream doing it again. I'd do this with the platinum plan and I would stay deluxe and value resorts for it. As an example, I'm thinking 1 day on platinum when we arrive which gets me 2 days of perks. We wouldn't do a park the first day. Then, I'd be getting my 1 day park tic on the second day upgraded to say a 4 day park tic. Use my 4 day park ticket while being in a value resort to enjoy the parks. Now midstream, do another stay under the platinum plan for 1 day again and then do the same for another upgrade to a 4 day park ticket. This gets me 10 days of park tickets. I could do it for a little less or more time in the parks, too; whatever works for your time allotment. In this scenario, I would get 4 days of perks on the platinum plan. I'm also thinking of doing two days in a row on the platinum plan, but then I only get 3 days of perks on the platinum plan, not 4 but I would save one move to a resort this way but the value is not as great.
The possibilities are really endless. I'm also thinking of doing one platinum 1 day stay and one premium 1 day stay. This would probably be the best way to go for the best value. I'll be planning how to get the best out of this situation under each plan. I would get 4 days of perks again, but would have to make resort changes in and out again.
Also, you need to make sure you get all the resrevations/bookings you want to make this plan work for you. I really think this is wonderful and it puts another spin on our experiences there. I would not fork over true costs for the various perks, but under the plan I would make it work for us very well.
Good luck to all and I hope everyone shares their experiences with this idea.