Look, will the storm likely weaken as it slows down just off the coast? Sure , most likely, but that doesn't diminish the effects, it just changes them. When have you last seen a Cat 3 hurricane slow to a crawl and even stall just off the coast as some of the models are depicting (with several placing the eyewall on the the coast for multiple hours)? This storm has the "potential" to be far more devastating then even a full on landfalling Cat 4 hurricane simply due to the shear amount of time the effects may be felt along such a large portion of the coastline. Its going to be interesting regardless and certainly should not be downplayed.