Most important, Disney won't let you book the
DDP if you transfer resorts. You'd be able to get it for the first resort, or any one of the resorts, but your tickets will also be tied to that resort package. You would still be able to use park tickets beyond that stay.
As others have said, you'll lose time with each move. Though WDW will transfer bags, you still need to check in and out of each, plus repacking, and unpacking. At WDW, time is critical - esp. early am time. Late pm time is uncrowded in the parks too. It also gets more complicated if you have to pack up wet bathing suits. To make it really work well at WDw, you'll want to get up early on transfer days so that you can get all your packing done and still be in the park around 9am-ish.
The most moves I've done is three in one trip: I got a great deal to fly down a day early, so we stayed one night at a cheap place. We did a few nights by Universal, then a longer stay on property. Also important: We had a rental car!
Here's what I'll say - if you pack correctly, then the un/re-packing isn't SO bad, but you'll still lose time. If you can do the minimalist thing: little make-up, little hair products, using the resort's hairdryer only, wearing shorts twice, that helps. If you are high maintenance, (needing lots of facial products, hair mousse and hairspray, curlers of any kind, your own hairdryer, changing clothes for dinner, etc. than staying put is MUCH better.
IF you are going to move, pack so that you only open like one suitcase per resort (plus a toiletries/pj's tote bag).
Generally,I'd stick to two resorts at WDW. That way you leave something to enjoy next time!