I'm not one for frivolous lawsuits, but that family deserves to walk away with a LOT of money.
Disney actively recruits tourists who *arent* from Florida and who don't know the first thing about gators. If I'm paying >$600/night for a room at a luxury hotel owned by one of the most famous corporations in the world, I would expect not only extensive education and warnings about life-threatening risks, but also legitimate barriers from said risks. This isn't ****ing Botswana.
If you have lethal, camouflaged apex predators within striking distance of your guests, you need to do a LOT to mitigate those risks.