Ha ha. Aaron Spelling felt this way also. Everyone was replaceable except Alexis.

She might end up being a surprise. On wiki they list everyone except Alexis:
https://en.wikipedia.org/wi…

THIS is why the show was a hit:

Joan Collins must return. She's what made the show a hit. The first season was boring, but once she made her debut it made the show fun! Her lines, her wardrobe… everything about her was must watch TV. They need her if Dynasty is going to become a hit.