Planogirl is right... in and of itself, adding Depp's face is neither "good" nor "bad".
The question is HOW they do it, if in fact they are going to do it.
Change is not good just for the sake of change. Change is good when it has a purpose.
If the purpose is simply to capitalize on the success of the film, and all they do is change a face on an existing pirate, that's about the biggest Ho Hum I can think of. I can't see that really drawing anybody in, and it wouldn't be a big enough change to promote very heavily. It also wouldn't pose any threat to the ride either.
But if they are going to do more than that, then HOW they do it becomes more important.
The idea that they are going to monkey around with the attraction (if true) because of the success of a movie doesn't exactly inspire me with confidence.
But I'd like to see/hear what exactly they are going to do before condemning it or praising it.
I've read that they have some pretty good ideas for adding some updated effects to the attraction, and those were considered for the DL version for the 50th, but eventually were axed along with most of the other ideas.
If adding Depp allows them to justify other true advancements/improvements, then it could be good, even if I don't think it should be necessary.