Original Alien vs. Now

I just saw a thread about who's acting was worse in Prometheus. I think a lot of it had to do with the script and the story they were trying to tell, as some actors had silly dialogue while others were just there and didn't contribute much of anything to the plot.

When I look back at the original Alien and think of Dallas, Kane, Ash, Lambert, Parker, Brett, Ripley, and Jonesy I see a talented cast with a great script and story to tell. Each of those characters had great scenes with one another (Brett/Parker with Ripley, Dallas with Kane and Ash, Lambert and Ripley's awkward tension to name a few).  I think it helped that this was an original story, it was fresh, it was new. It was a thriller, action, some comedy.

The problem I think with Prometheus was that they tried to emulate that and make it more. The scenes with Milburn and Fifield were an obvious homage to Parker and Brett. The Janek and Vickers weird sexual tension was because of the unmentioned promiscuity of the crew of the Nostromo (deleted or unshot scene I believe of Lambert and Ripley talking about which of the crew they slept with).

I can't blame the cast of Prometheus, but I can blame the script writing, and the senseless need to try and re-create that original crew magic as opposed to letting the new cast forge their own way. Hopefully this is different in Covenant.

Thoughts?