Well, first of all, the price of your AP's just went WAY down! Welcome to the Sunshine State!
The only downside I can think of would be if you were in Pensacola, or out that way and would have a really long drive. But it would still be doable in one day. Driving from anywhere else in Florida will be easy expressway driving the whole way.
Driving AT WDW is SO much easier than depending on Disney transportation. No waits for buses, no riding with people who haven't bathed in a week, no standing up the whole way, come and go as you please...the list goes on and on. You're going to find yourself driving back to the resort mid-day for pool/nap breaks, eating at some great offsite restaurants, shopping at outlet malls, discovering lots of other interesting things in the Orlando area besides WDW. And your pace at the parks will slow WAY down, because you'll be going more often for shorter stays. You're gonna love it!