John should have remained Roman. I think that is when the show jumped the shark, in my opinion. John and Roman were both damaged beyond repair after the tale of two Romans. Dee should never had demanded the writers bring back her friend Wayne as Roman.
Also, I have always wanted Carly to have been a villainess. She and Lawrence were dynamite together. It should have been revealed that she was using a vulnerable Bo who is grieving Hope, to get close the Kiriakis money after having lost her fortune. Once she realized that Bo wanted nothing to do with that. She could have set her sights on Victor. Perhaps Bo could have saved Victor from her. drawing Victor and Bo closer together irritating Shawn. I did love Bo and Carly version 1 but Lawrence and Carly had potent chemistry. An evil duo wreaking havoc in Salem who are not Dimeras could have been great.
Victor trying to kill Bo for Carly was so out of character for me. I hated that story with a passion. Victor was so delusional regarding Carly, it made him look like a weak fool.