It sounds to me like AMEX could be the spark that gets this moving again, and if so I also think there's a chance we'll see a redesign - but hopefully only minor changes to what's currently public.
When looking at the brilliant renders by Xing Lin I can see 1 and 2 WTC looking quite striking together with the current 2WTC silhouette, especially from certain angles... so I'm a fan!
A reminder:
Photo credit: Marco Verch [Flickr link appears to be dead], render by Xing Lin (of course)
Photo credit:
Bill Benzon, render by Xing Lin (duh)
I can't get enough of your work Xing!