One hot strong mage. Wish they had a more younger hotter actress to play it :(. Not saying Rosamund Pike isn't attractive in her own degree but if she was doing this at her Tomorrow Never Dies age then it would be fine.
It was a character point of the novels that Morraine was very short and petite. Despite her diminutive size her presence alone could command a room. Casting an actress of above average height diminishes the effect.
I think she's good casting. She's a good and versatile actress, can definitely play regal, aloof, and highly intelligent, and she's always had a bit of an ageless quality.
She could seem oddly mature when she was young, as if she'd lived for a long time without aging. And that's definitely a quality you want when casting a mysterious sorceress.
Ruth Wilson would have been my pick, but I'm not sure she would have been better than Rosamund Pike as far as the acting goes. Physically better yes. Ruth is a few years younger and looks stronger than Rosamund.
Ruth Wilson is Eve Yill personified !? Obviously you haven't seen her as Jane Eyre in the 2006 TV mini-series of the same name where she was gentle, kind and true of heart, although admittedly a little horny at times.
Except that Tyler comes across as rather sweet, and Pike never does. The character as written in the books was aloof and kinda scary, Tyler isn't scary but Pike can be.