There are various paths over Tsing Yi that also offer good vantage points.
An alternative would be to do it from the sea:
http://intimate-charters.com/favourite_6.html
One of the unusual (or even unique) things about container operations in HK, particularly for the smaller vessels, is how much of the on/off-loading and transhipment is done at anchor in the harbour using barges rather than alongside the main terminals.
EDIT - this is weird - why can't I link Facebook albums here?
Try
https://www.face book.com/pg/IntimateCharters/photos/?tab=album&album_id=741252539320148 and delete the space