If you think that the actors shut up and do what the directors say all the time, I'd agree.

I wonder if a better actor might not speak out more if her role was so clearly crappy, and influence things a bit.

I know it's a hard argument to sell, since it depends on variables we wouldn't know about unless we were there, but...

can't help it. I hear you guys, but I saw Godfather III again like a year or so ago, and Sofia's performance was embarrassingly bad. And especially so amidst other actors that usually know what they're doing. Even if I didn't know that it was the director's daughter, I would've assumed it, or thought that it was the producer's girlfriend or something. Yeah she was working from a bad script, but in a couple scenes it seriously looked like she was reading straight from cue cards, without any voice inflection. Shit was painful.