Maybe this is a stupid question, but how come the SOM renders and models (as in the above 2-d render) show the building to have no taper?
Regarding the same render, how about making the antenna ring a 2-level glassed-in observation deck, angling outward as the render depicts. The outdoor section could be on it's roof, right at 1400 ft.
Outward-canted glass would certainly look much nicer than rows of microwave antenna dishes-which in my view detracts significantly from the overall structure. (still can't figure out why the change from the much more esthetic polygon shaped original design

)