Any Taylor return past her 2002 death and burial... didn't work IMO. I love Hunter Tylo, but at some point the character was better off dead. We even saw her as a ghost several times. It was ghoulish and bizarre and the fact that Bradley decided to completely ruin her and make her a shell of her former self didn't help. Taylor became even more chaotic and messy than Brooke at some point... She was a counter-point to Brooke and should have stayed like this. We didn't need to see her drunk-drive-killing Darla and then getting it on with her daughter's boyfriend Rick. It was too Brooke-esque. Didn't work.
There was deterioration in the acting department too. Hunter Tylo's face was too frozen for her to emote, so she would constantly scream, raise her voice or shake her head like a maniac, which didn't suit the previously elegant and more... nuanced Taylor. She became a cartoon.
After that with the new actresses, as much as I adore Krista Allen... Bradley still gave rinse and repeat of old stuff from the Hunter days... and now Rebecca is getting the same storyline too. Beat by beat. 1 - Brooke does something to disappoint Ridge. 2 - He leaves her. 3 - He gets engaged to Taylor. 4 - Last minute realizes he can't live without Brooke. We've seen this played out more times than I can count. It's the most dead storyline in the show.