I'm a bit surprised that Bobbie Eakes 2003 departure can still cause blood boiling on speculations when it is all perfectly documented in the press forever.
Macy returned in 2002. She was a major frontburner star for the next month. Then, Brad and CBS suddenly went all "let's grab some ABC stars" and hired Sydney Penny and Brian Gaskill. While most viewers immediately realized that the characters of Sam and Ozzy sucked and the actors were not able to excel their material, this was the direction B&B entered in fall 2003.
Brad therefore opted to write Macy into a coma to give the character a rest and focus on his new pets (remember: this is also when Adienne Frantz suddenly experienced backburner status for the first time ever after 6 years of 24/7 appearances...). Bobbie Eakes - based on her previous experience of being let go for storyline reasons in 2000 - or maybe it was her manager Michael Bruno who had ties to ABC soaps - then heard of the AMC casting for Krystal Carey. B&B was clear to Bobbie Eakes: either you stay or go recurring if you want to audition. She went to the audition in New York and the rest is history. Krystal Carey was a major unexpected career highlight for Bobbie Eakes and probably made her a ton of money. At least, it gave her wide recognition at the Emmys when they were still a thing. I don't think anyone, neither Bobbie Eakes nor Brad Bell, involved has hard feelings about the situation - except for us longtime viewers who loved Macy and the Spectras - and who hated the sudden way too soon departure of Macy. The death of Darlene Conley then terminated this part of the show which we all cherished so much - without Macy being present. A major disgrace. Yet, the original reason for Macy's absence is nothing unusual: employer and employee had different expectations, the employee found a better job elsewhere and left. Period. It's not one of those Hollywood vendettas.
Same for Krista Allen: I can't remember if they wanted to cut her salary orif she simply disagreed on a storyline direction wiith the show. The actress (which I agree was a splendid Taylor recast) was unhappy with the show and opted to leave. She was not fired - she decided to move to Atlanta and did not want to play recurring or on a lesser episode guarantee. I can't remember any interview where she said such a thing of being fired.