No like.
For all its faults, the old building tried to fit in (size and height wise) with its neighbours. It only dominated one end of Grosvenor Square: Turn your back on it, and it was gone! The square remained a green and pleasant space. At night, all you really noticed was the flag - which was cool. The building melted into the urban streetscape.
But this new bristling carbuncle. What to say? It looks like there was a dear green square on the site - before this "landing-craft" plopped from the sky, slap-bang in the middle. It positively screams, "Look at me! Look at ME!", followed by a robotic, "Take me to your leader".