We don't expect Dennis to become a hurricane again. Whether the storm makes landfall is questionable.
Storm surge (in coastal areas) could be a real problem, depending on where the actual landfall is. That's the thing we are most concerned about.
The fear of a stall is that it makes the storm surge much larger, because it sits there and pushes water up on the coast for a long time. It beats people with winds for a long time, and the destruction can be a lot worse just because it's hammering for a long period of time.
Andrew was almost the same intensity as this storm, but Andrew was small. This is a huge storm so ... (Floyd) is much more dangerous than Andrew.