One criticism, the light in the sky is coming from behind the building, slightly off to the right according to the light levels in the clouds. The light on the building is coming from slightly front & right - so there is a miss-match between light source for the sky and for the model.
Just me being picky, but this sort of thing screams out at me…
Nice render of the building though - presumably the client is going to refurbish, or build the building?
Ignore them (but supply to them what they want, of course), keep working on this type of render for your own enjoyment. It has massive potential and will be appreciated by those on this website at least. It’s nice to see something new and “out of the ordinary”.
Was ity the client that wanted a winters view of the building, it looks very cold, do they want renders other seasons. A little greenery and warmer colours usually help to sell properties. Reminds me of my last visit to NY, you have picked up the character of the streets in the image.
Considering the quality of architecture in the modern age, that is a foolish approach for architects to have. Besides which the first one enhances the look of the building and the second one does nothing. It’s like the difference between a professional portrait where the photographer spends a bunch of time setting up the lights to be just right, vs. a selfie of the same subject in front of a bus station.