Milton is so far doing an excellent job of fighting off the shear. As someone else just eluded too, new deep convection (-80C or colder) cloud tops have begun wrapping around the Western half of the system. The ragged appearance this morning was likely due to a combination of the ERC and overall less favorable conditions.
Additionally, dry air intrusion is currently minimal if at all. The models that weaken Milton the most on final approach have dry air wrapping around the entire Southeastern portion of the storm. It will be interesting to see if this happens.
The 12z sounding out of Key West still shows a very moist environment.