sunset/sunrise very cliche shots, so you have to work hard for a good one. This one is boring. nothing in the sky except the orangy red, and HDB flats isnt the most exciting of skyline.
And I dont think you shld take the shadow/highlight suggestion. I rather not see boring details in the flats. I rather send all the bldgs into shadow with levels and just emphasize on the skyline, which however, as mentioned, is not to exciting either.
I have not seen any HDB 'landscape" that is interesting so far.