I don't hate the CG in 'Legend'

From what I've read, many don't like the CG in the knew Will Smith movie "I am Legend," and I can understand that because even looking in the commercials the animals look like crap. Their movements, texture, and even sometimes their shape look like utter crap. So then why don't I care about the CG in "I am Legend" ?

Because, it does not have anything to do with the movie what so ever. I took a break from work to spend an hour and a half at the theater and came away with more questions surrounding the movie then questions that surround the graphics. Hell, the producers could have pulled a fast one on us and saved money by putting people in animal costumes, similar to that which you see at a children's party, and I still would not have cared. But what I do care about is this?

(SPOILER ALERT: Text is written in black, so highlight to know my real question about the movie)

I know the movie was originally a book from what I understand and written many years ago. But shouldn't the producers of the movie said damn, I would love to make this movie but its really just taking '28 Days Later' and adding in a little bit of Castaway. Instead of hearing Sam all the time, I would have sworn I heard Smith saying "Wilsoooooooon".

[ ROPEOFSILCON ]