The old series would have suffered without Roseanne but the new series wont
Cause everyone needs to face it, Roseanne was awful in the new season, she delivered her lines like she was reading them off a cue card, her timing and delivery just felt off, its like she forgot how to act. She was definitely the weakest of the cast that returned in terms of acting.
Plus the way the show was going Roseanne was more or less a background character anyways, it felt more geared towards Darlene with Roseanne popping up here and there.
Back in the day of the original show in the 90's it couldn't have survived without Roseanne, she was the center piece and her delivery and comedic timing was perfect back then. Unlike now where she sounds wooden as hell and like shes barely remembering what to say half the time.