If Nathalie Kelley didn't have the chops to elevate Cristal as a likable, charismatic and dynamic character, then that's on her, not the writers. Yes the writers share a large majority of the blame for botching the execution in the first place, but she gets to share some of the blame too. Also... I'm sorry but where is this talk about Cristal being more "devoted and loving" towards her husband coming from?! Blake is a horrible, disgusting excuse for a human being and his relationship/marriage to OldCristal was toxic to the extreme.
And if I have to be honest, Cristal is actually better off dead and six feet under because at least Blake won't ever have any more chances to win her back and then continue to manipulate and control her when the opportunity arises. I am hoping that NuCristal, regardless of whether or not she becomes a more evil and devious version of OldCristal, does not get roped into a marriage with Blake like her predecessor.
I would rather see Alexis and Blake marry again and torment each other for all eternity than see another decent woman trapped in a loveless, dysfunctional marriage. Blake deserves no one. He is selfish, narcissistic and completely heartless and he has made the lives of everyone that he purportedly claims to love a living hell. He should've died in that fire, not Cristal. At least the show might've been better off.
Sometimes if the character ends up not working regardless of whether or not the actor is any good, then that character just doesn't work period. Even if Nathalie Kelley wasn't so inferior and she actually had Oscar-winning capabilities as an actress, she probably still would've been canned anyway because there's still a chance Cristal would've flopped regardless.
This reminds me of what has just happened on General Hospital with Chloe Lanier. Despite of her having won a Daytime Emmy recently for her role of Nelle Benson, she still chose to leave the show in favor of other pursuits. But honestly I think the real reason for her departure is that the writers turned Nelle into a crazy, unhinged sociopath and she just wasn't satisfied with the direction they were going with her character and therefore she decided to run for the hills.
So what happened here in this situation? If Chloe Lanier was so good, then why did Nelle still fail as a character? The bottom line here ladies and gentlemen is the writers. They came up with such a convoluted and ridiculous backstory with Nelle, ranging with the whole stolen kidney situation with Josslyn Jacks, to her turning out to be Carly Corinthos's adopted kid sister, (which, come to think of it, seems kind of bizarre and practically incestuous since she did end up marrying Carly's son Michael, who technically might be considered her adopted nephew???), and then with her having been a mental hospital patient and being accused of murdering her last fiance.
The execution of Nelle was botched so horribly that regardless of Chloe Lanier's acting abilities she just wasn't going to work as a character. And maybe that's the whole reasoning behind the recasting of Cristal Flores Carrington and the writers felt that she just needed a major do-over.
What's really sad is that if Cristal had been cast with a stronger actress and she had better writing, she could have had a long-term, viable future on the show. And now this storyline is either going to save Dynasty or basically send it into an early grave.