No, it was just fixed before I arrived and actually it was the protective coating that crackled, no one was ever in danger
No glass is not cracked. It is worth it just to see the city and do the Skydeck. My cousin only stood on the ledge close to door. I moved into it and my grand daughter stood between us. We purchased tickets before hand so we moved right into the Lines and they moved quickly.
Not on the one I went on.