As a consequence, it makes little sense for Childs to compromise his own vision overmuch in the service of a greater unity which might well never happen. (Even if the other office towers do get built, there's no guarantee that their architects will pay any more obeisance to the Libeskind master plan than Childs has done.) So the sloping roof is likely to go, the height of the tower is likely to increase from Libeskind's symbolic 1,776 feet to the CAA's maximum allowable 2,000 feet, and the spire could well be jettisoned entirely.
I haven't seen any new designs which make me say this. But I have seen the news reports, and it's clear that Libeskind and Silverstein are barely on speaking terms any more. Libeskind wants $800,000 for his work on the Freedom Tower; Silverstein has offered $125,000 and clearly has no interest maintaining a good working relationship with the avant-garde architect.