Well, if Brosnan's not happy with the script there's not much more to be said on that.
As for Stewart, it's a shame to hear that he is rather "unpleasant." I guess he really knows how to work in front of the camera, as every interview that I've seen him in portrays him as a jolly 'ol English fellow who you'd wanna' tea-up with; he seems like such a likeable guy...
I worked at the San Diego 'Con in '98, and had the distinct privelage of helping Walter Koenig check into the grounds. The hatred that he felt for the entire occasion was as plain as the nose on his face. When I asked him for his autograph, he replied by saying, "Oh God, why the hell not." He rolled his eyes, scribbled on my program guide and stomped off. His wide eyed assistant just smiled, tried to apologize and scampered after him.
What is it with these guys anyway? Talk about biting the hand that not only feeds you but makes you, too...