>I haven't really seen her stronger
>compared to her previous appearance. The wording "stronger" can mean both physically and mentally. There's not a doubt at all that Amber is being shown as a much stronger player mentally this time around with the editing -- we've seen her scheming, we've seen her talking up boots with other contestants, and we've seen her get outed by Shii Ann as a player. Her confessional time is enormous by comparison to S2.
By contrast, in S2 we saw her edited as a total lamb who didn't say much of anything at all and appeared to be brainless, especially when she voted to stay with the other Ogakors instead of switching over to vote with Elisabeth/Rodger and getting control of the game. For all we know, she did consider doing that but we weren't shown that, we were only shown her sitting on her hands and going along with Benedict Tina and Colby.
I think what is most likely to have happened is that Lamber grew up (she was what, 21 or 22 in S2?) and became wiser to how people and things work. Sure, we've seen times where she is edited as riding Rob's coattails, but we've also seen editing of her as a strong player via Kathy and Shii's comments, and through her convincing Kathy and Lex to not vote her out.
IMHO, she'd make a deserving winner if she won the jury vote, based on the editing. At least she wouldn't be a Vecepia or JennaM type of winner that leaves a bad taste in the mouth.