Gotta say i prefer the old Ellie...i immediately picked up the difference in the trailer.
I think the reason why they changed her is because of all the talk of how similar Ellie looks to Ellen Page. Given that Ellie does have an actor already i guess it was better to model her more inline with the actual person playing the role.
And well, i love Ellen Page...so thats one reason why i dont like the new Ellie. Also the new character model looks younger...which based on the first trailer i thought she was meant to be a oldish teenager (16, 17?). I thought the combo of a older guy and a older teen fitted well. They could have still worked the father/daughter angle.
Aside from the deliberate changes though, the new model simply looks less real...looks more like a manican...whereas the older model seems to show more emotion in the pictures ive seen so far. I also get the feeling of a strong character in the old version...something i cant seem to pick up in the new.
Hope that made sense to any1 who bothers to read