I personally think she's nothing special. As a person I don't know her so I can't judge her, but as a singer I think she s.u.c.k.s 'cause she has got the voice of a twelve years old girl, she has no vocal extension when singing and her music is insignificant. Also her last album "Love songs" is banal and I didn't like at all its type of sound. It was awful. Then as an actress I think she's terribly boring and nothing special neither, her acting ways are monotonous (that's why she never succeeded in becoming a hollywoodian star like Marion Cotillard and some other french actress). Finally as a woman I don't think she's that beautiful 'cause her teeth are horrible and she's too much skinny and bony, with a shapeless body to be definied a sex symbol or a real beautiful woman. For me beautiful women must have shapes and not a boy body. So, I'm sorry but I personally never liked her.
Meh I don't think she ever helped Johnny Depp because he never changed in all these years. He still likes to drink and to have night-parties living a wild life. She never did anything for him. He settled down a little bit only when his children were born, so it's his children who helped him for a while to calm down, but not Vanessa. Maybe no woman can help him. We'll se what Amber Heard will be able to do for him now that he's a half-aged man. I hope they will be happy and that he won't lose a wonderful girl like Amber 'cause he would be stupid. Concerning Vanessa I think the only interesting thing about her until now has been her relationship with Depp.