There are some good ideas in the film but, not fully realised. Poor characterisation as well, especially compared to the first film, which had 'blue collar type' workers in space.
But who acted in a more professional and scientifically accurate manner when dealing with a potential contaminant.
The gung ho behaviour of the Prometheus crew was totally unbelievable - especially considering they are supposed to be professional scientists. The blue-collar crew of the Nostromo were much more methodical and measured in their approach - and Alien was no less exciting for it.