The aliens looked fine and the last scene, where we finally get a good look at them, is gorgeous. And it wouldn't be that you've been influenced by knowing that they were cooked up on a PC by the director, because that was widely publicised ? Considering the film was made on a microscopic budget and a crew of 5 including the actors, the film looks spectacular. And he didn't just create the aliens on his PC, but whole landscapes of destruction and debris they creatures left behind. It was quite an achivement.
The director got nabbed by Hollywood to do another Godzilla remake, so you'll probably get your wish: A bland giant moster movie like many others, rather than a small British indie film with a very personal vision which completely subverts its own genre.