I adamantly disagree with you about Sophia. Such a perjorative assessment of her performance is without merit. She portrayed a typical 19 year old. She did it well. She was naive, vulnerable, trusting, and loving. With five girls, I do know what girls act like at that age and she pegged it.
So you're a mind reader, also. You know that FFC intended her part to be the ultimate part. Sorry, my ESP isn't that good.
Methinks thou dost protest too much.