Above: 060118z GFS ensembles. Image cr. Weathernerds.org

The 18z GFS ensembles overall seem to have a much better handle on a more easterly starting position.

Taking a bird's eye view of things, the shift east from other, earlier model runs doesn't change the longer range forecast all that much, as there is consensus on taking whatever 91L is or becomes, north, before veering northeast, such that South Florida would still get a lot of weather, regardless. It just might have more bearing on how much of the state, as well as other locations like Cuba and the Bahamas, see inclement weather.