The viewpoint of the winning flag is looking down from the glass floor of the tower at the lobby level glass ceiling, not looking up at the underside of the tower. Markusoff and the judges didn't get that obviously. The base of the tower isn't all glass.
That glass ceiling will no longer exist in that form once the redevelopment goes ahead.
"while I feel the underside of the glass deck could look simpler, I love the concept and effect. "