Performance or no Performance, It was Ripley who ruined the Franchise not the Directors....(for me)
1 main Character over the span of what ? 300 years.....and did we ever learn that much about the Alien itself? The space Jockey?
The scripts were built around her, and not around the Alien......Which is why Alien is so good and the rest are so poor.
Aliens is the exception because Cameron at least filled the screen with Memorable characters and great Action sets. (and also a reason to include her part)
Can you Imagine Predator with Dutch flighting the Predators every movie.....?
I'd rather have a Anderson Half assed AVP, than ever see ripley in another Alien movie.