Frankly I never understood the Corning glass blowing deal. To me it made as much sense as having a demonstration area for rebuilding automobile engines. Personally the latter would interest me more than a guy making a bottle, but both are silly for a cruise ship.
Although Celebrity says the Corning deal will remain on the first three ships in the class, it is just a matter of time before they are removed and the Lawn Grill installed. Bottom line - the grill is a revenue center and the glass blowing isn't.