First takeaways..
The design overall is spectacular, 1000% a must-build. Only thing I would wish if I was a wishing man, is that the roof lattice crown be extrapolated higher and to a narrower point, so as to mirror One Vanderbilt and give a less stubby appearance on top. That said you could build it just like this and I would still be on board.
Also, the staircase connection to the upper roadway around GCT is fantastic and something that I feel should have always existed and want more of. Additionally, in observing the upper level lobby visible through the central window at the base, I ask myself: is this the beginning of an elevated terminal-area road network/ground level? A Chicago's upper & lower Wacker-type of arrangement is what I am seeing, with the original ground level becoming more of a sublevel and the present-day upper roadway level becoming the new outside ground level. While this seems like an extreme prediction now, I suspect climate change may originate cause for large portions of Manhattan being reassessed this way. You are also seeing this now in the High Line-level network of passageways slowly developing between Penn Station and Hudson Yards.

Two thumbs up!