I think his ideas are not actually too original to be fair..... but visually he has a good idea, so he is certainly someone you would want on board to give some ideas to how visually something could come across on screen, i would like his ideas pitched to someone who can add their own to them and come up with a Good Plot.
Then allow Blomkamp to have a great amount of input with Ridley Scott on how Visually to portray things on screen.
Edit:
I will add that this kind of role is something that can really make/break a movie. If HR Giger was never considered as inspiration and also allowed to work on ALIEN it could have been a much more different movie, if we then took away O'Bannon's ideas as far as the Life-Cycle then ALIEN would have not stood out from any other 70's/80's kind of Sci Fi/Horror Alien/Monster Flicks.