If you can swing the price tag -- Do it!
We stayed for a 4 night trip in early December a few years ago. It was magical! The holiday decorations in the main lobby are amazing and it was a great way to start our December.
How old are your kids? Is MK still a big draw? For us, we love to stay on the monorail/boat loop because it makes travelling to MK so easy. We like to be there every day, even if it's just for dinner after a day at another park. Traveling to/from the GF is sooo easy.
I for one wouldn't want to pack up and move mid-week if I can avoid it. That said, we are thinking about doing just that to get a longer trip next time. But it's a trade off of staying 6 nights on property, or 10 split. We have been to Orlando 6 times and have still never made it to Sea World because we can't bring ourselves to leave Disney.
We're thinking actually leaving the property may be our only hope.