It looks so familiar and yet so different...

The white matches the Wells Fargo Center, Liberty Plaza, RAI Plaza, 250 West First, and Truist Park. Rectangles and squares also work well with Truist Park, Liberty Plaza, the Federal Building, and the Wells Fargo Center. This design would have glazed sections, too. The sides are designed to match 500 West 5th, with inset balconies and slightly inset (east/west) side windows. It adds balconies and texture to the structure. However, the big change is making the building appear taller by removing the angled roof and going upward on the north and south facades. This design is 2 metres (about 6.25 feet) taller, due to the box that rises above the elevators. This becomes an area where the developer can add a building name/signage. However, most of the taller appearance is from continuing the north and south facades upward, instead of cutting those sides 2.5 storeys short and angling them. This gives the 20th floor a full floor plate instead of being a partial floor plate. The illusion of extra height, on the north/south facades, also works better with the tall building beside it and getting it to match-up with the set back Pelli designed for it. I've also noticed the highly visible angled roof in the original 1980s design often looks dirty or faded (it looks dirty right now) and this removes that problem. It allows the 20th floor, which has very little window area and is smaller in the 1980s design, to become an amenity floor for the building, with outdoor areas and an enclosed bar, kitchen, and entertainment space. I think you could likely rise the floor and add a shallow pool, like the Nissen Building, on the 20th floor? I didn't do that, but a developer may explore that idea. Removing the angled steel also involves cutting the concrete designed to anchor the angled steel for the roof to the building and the saw used would be fun to watch. It's a massive concrete cutter and I've seen one before in action. The 21st floor mechanical penthouse has translucent glass with LED lighting that is designed to light-up at night and give the building a visible presence on the night skyline on all four sides. It can also change colors. The balconies can be inset, along with windows, which adds to the depth and design, but doesn't add small projecting slabs to the design. There are several inset windows that are operable. The first floor projection, south toward the reflecting pool, can become a restaurant with outdoor seating and the projection's roof can remove the barrel vault to add an outdoor amenity area. The restaurant and maybe an outdoor bar would activate the upper park. People using the amenity area above the restaurant projection would also add to the people presence in the park. I'm sure the view is nice up there. The glass elevators would be preserved and the green glass would be replaced, which is often said to be a problem. These inset balconies and outdoor spaces can make the building attractive for both modern office and residential uses. Actually, the 20th floor amenity area makes this very similar to a Skyhouse, which is named for its top floor amenity area.