I think it is the very square plates on the bottom of a very widely known round saucer. The rest looks OK to me. They probably should have used a picture of a different angle.

Yeah the Lego layers of the saucer section look very angular and homogenous. It just looks like a big block of Lego - doesnt give a sense of it being a ship with lots of decks with windows.

Also the tail section looks very angular.

I can imagine its very difficult to capture the curves of the ship in legp, and its recognisable but... Nah thanks.