The WTC site should be cleared and a tasteful memorial placed at ground zero. That's it - no skyscrapers, statues, lone staircases, or twisted metal shaped like a cross.
You know better than that. Prime Manhattan real estate etc.
Much of the original WTC was not leased at the time of the 911 attacks. I don;t know many folks who will want to work on the 90th floor of the fattest, slowest, and biggest target in the USA.