What IS enough?
You're saying she was too "help me" in the game, and then you also say she was too awesome and brutal and savage too quickly. So which is it? Is she helpless or TOO vicious? .
The problem is that she is certainly both and that the transition is handled clumsily.
What was wrong with Jonah, Roth, or even Sam? The only one I didn't like was the dirtbag archaeologist... and we're not SUPPOSED to like him.
You're forgetting the others (whose names also escape me), there is the angry black woman, the naive nerdy guy, and crabby old ships captain. None of them justify their reason for being there, the way Lara is constantly crying about Sam certainly contrasts with her growth and served as a poorly justified Mcguffin. Nothing shown about Roth shows why Lara respects him, and I couldn't give a crap when he died. All in all the secondary cast gives the feeling of a teen afternoon tv show.