I always felt that SB left to work with Jill FP, who use to be GH. I think as long as she is with YR, so will SB. Just a hunch.
And I've loved each Carly (except for one who was on a short time), so the right recast can work. They proved it with Carly. Loved Sarah Brown until Tamara Braun came on and she was great. Skip the 3rd, then they brought on LW and she one me over right away. So we'll see.