"To be utterly subjective and to give my personal opinion".. an interesting paradox there.
anyway...
As far as EC's talent or lack of it goes - doubtless many people here saw her being interviewed on BBC2 at Glastonbury a couple of years back. Suddenly bereft of her band, (the bad weather meant gear couldn't be moved or something) she gave an awesome performance of Irving Berlin's Colour Blind. I've seen her live a few times - always a joy, but this performance was just stunning. I reckon anyone who can give a show like that has earned their Musician's Union membership.
I've never found her to be remotely like a Prima Donna on the couple of occassions I've thanked her for a great gig - the other thing she inherited from her parents are a scoail conscience and sense of equality.
She's very much that good!