Lots of interesting back and forth.
I think if Disney could have "easily" placed a new shop/attraction/eating spot in the chalet they would have.
The point is, it wasn't easy. Some of the issues that caused Skyway to close to begin with still exist and there are no easy solutions.
Removing it removes a potential liability. Someone in this thread I saw a video from someone who obviously trespassed to get the video. Had they gotten injured doing so, Disney could be found liable for damages.
So if using it is not a viable option and maintaining it is not an option, removal is the only option left.
Whether or not they reuse the area isn't really the issue, it is that status quo is no longer acceptable. Why now? Who knows, maybe there is more urgency than in the past, but I can't really see how it effects anyones experience in the park, good or bad.