Christine - I've listened to a little bit of In the Meantime. Her voice sounded good and strong. Of course her voice has remained the most consistent of the three. It's hard for me to judge her keyboard playing skills, though I do appreciate her style of playing the more sensible, rhythm role.
Lindsey - Lindsey's voice was good back in the day. Since SYW, its been not good(trying to be nice, here
) His guitar playing is perfect though!
Stevie - Her voice has changed soooooo many times over the years. For me her best voice is the Mirage era. Her voice today is better that what it was around Say You Will era. I remember Stevie saying somewhere that while the others play instruments, for her, her voice is her instrument.
John and Mick - one of the main reasons I adore Fleetwood Mac is due to the emphasis on the rhythm and bass in most of their songs. I've noticed though since Tango in the Night, that aspect has been toned down some. Love Mick's playing on Stevie's In Your Dreams.