As for question of whether this is a frivolous lawsuit or not... the answer is maybe not. My DM is President of the local chapter of the Federation of the Blind (FOB) and is pretty up-to-date on most of the litigation regarding accessibility although she hasn't heard of the Disney case. Despite the numerous laws out there, very few have any teeth when it comes to compliance. Examples: There is a federal law that says all federal websites must be accessible to readers, yet few are. VI school children constantly go without textbooks because suppliers won't convert the texts to large print or braille. Penn State is one of the worst offenders of the ADA.
Because there is little to no penalty for non-compliance, sometimes the only way to make companies sit up and take notice is by bringing a lawsuit. In this case, it sounds like the threat of one already has caused some improvements to be made. If though, Disney thought that it wasn't cost effective to add warning strips in the parking garages so VI people would know when a walkway ended and driving lane began, that's a problem.
How else do you propose to get them to change their mind and comply with the law?
Because there is little to no penalty for non-compliance, sometimes the only way to make companies sit up and take notice is by bringing a lawsuit. In this case, it sounds like the threat of one already has caused some improvements to be made. If though, Disney thought that it wasn't cost effective to add warning strips in the parking garages so VI people would know when a walkway ended and driving lane began, that's a problem.
How else do you propose to get them to change their mind and comply with the law?