There has not been a change in the official forecast, but the 2 PM models all shifted 150-200 miles to the left (away from WDW), so the 5 PM forecast could reflect that shift.
However, the models for this system have been fluctuating like that for two weeks. This has really been a crazy system to watch.
I don't really expect the NHC to change their projected track much until they get confirmation of that shift, and that won't come until tomorrow. It might come as a result of the 8 AM model runs, but they might also wait until the afternoon to get a hurricane-hunter aircraft into the storm to really get solid info.
They'll err on the side of caution, because the storm may be close to Key West by that point, and they don't want people to relax and find themselves in trouble.