An oft repeated sentiment, but if Eileen had been cast as another character, perhaps a sibling of Madeline from Grant Capwell's side of the family tree, I think the fans might have accepted it a bit more. Until Eileen went to DAYS, she was stereotyped as a wealthy daughter, so it might have been more appealing to allow her to play against type, and then lure Cruz into a romance with someone who did not so closely resemble Eden as a character (I always felt the various writers failed to differentiate Kelly and Eden's personality in a significant way).
However, Reese and Jody were so unpopular, and really changed the tone of the show. They were reflective of the de-glamorization of the soaps in the 1990's that was such a poor fit for SB. It felt like in response to the success that GH had in its reinvention in the 90's to be more grounded and tell more human-based melodrama, SB desperately wanted to keep up with the times when they shifted to Pam Long's style of storytelling. Yet, as a fan, I still wanted to see Sophia descend the stairway of the Capwell mansion in a gown for dinner, the Lockridges at the polo club, and Gina striving for money and success. By the time nu-Kelly came around, along with nu-Ted, there was so much less focus of Capwell Industries and the manor, even the lighting became more sepia toned and dark, it was not what I wanted.
I once chatted with Michael Maloney https://soaphub.com/author/michaelmaloney1935/ who was part of the production staff of B^B from 1990/1991 after buying some old SODs from him via eBay LOL
Interestingly, he did not any specific reason for the Beth recast when asked.