Why are people petitioning Merida's redesign?

You kind of answered the question yourself. People said that she is sexualized, and shows cleavage (which I do not see) I also heard that some said she was in a sexual pose (again, I do not see). Another thing is that how she is not her character and how they glamorized her too much. Practically a bunch of parents who think that a princess is to blame for their child's issues.

It's because she's been aged by a couple years, given more cleavage and a nipped in waist. Plus her lips are thicker, her eyes are more done up, and her hair is thicker. She has been considerably sexualised (as have all the girls). People aso have a problem with the dress not having her bow and arrow, but her DP look is based on the end scene which everyone is forgetting.

Cuz people that don't know shit about art like to start crap and try and tell an animation company how to draw their own creations

I am so G-DAMN ( excuse me) sick and tired of so called Feminists and experts BITCHING about Disney Princesses being " Bad role-models and too skinny" - Then by God, don't ever let your child out in the real world. And I am over-weight, have been a good portion of my life, but I have NEVER EVER EVER, compared myself to a CARTOON PRINCESS. Its a drawing. Also just because the other ten Princesses might wear pink, glitter, dresses and get married does not make them anti-female.
Im sick of Feminists thinking they are making a valid point by bashing men. Feminism is about equality not about what gender is better. Men are not evil or bad. We can get married. Disney Princesses can get married. Doesn't make them anti-female. Get a Grip " Experts"

Because she was meant to be the one tomboy princess for tomboy girls to relate and look up to. Glamorizing and sexualizing her, which she strongly resists in her movie and never gives into, sends a subliminal message to little girls that they all have to succumb to the fashion, sparkles, sexiness, etc.

Literally every other princess is feminine and gets dolled up in her movie. Merida was the one who was supposed to show that not all princesses have to fit into the pretty, feminine, fashionable cookie-cutter stereotype. That there is no one right way to be a princess or a girl. That you can be a rough and tumble--JUST KIDDING!!! SHE'S A PRETTY SPARKLING VIXEN TOO!! DON'T YOU WANT TO BE LIKE HER NOW, LITTLE GIRLS??

We know you THINK you're not into fashion, makeup, sparkles, etc. We know you think you relate to her because she's a rough-and-tumble tomboy who cares more about adventure, sports, etc. But really, all girls only care about fashion at the end of the day, and we know you do too.

We know we said "be yourself" in the film, but what we REALLY MEAN is conform to every other girly glammed image we've thrown at you so far. Conform to how society at large and the larger Disney Princess merchanising company tells you out all little girls are supposed to be, want to be, and be interested in.

FUCK. THAT.

Yeah i agree with @Jayden-G

Even the creator of Brave, Brenda Chapman, has a problem with the design too. I think Merida looks great though.

I don't know,but it confuses me. And no Jessikaroo she didn't age. Also,just to let you know,I'M the one who pointed out her curves.

I see the change in her look, but I don't really see a reason why they'd petition for it. It's not that big of a deal. (I suppose I would've made a fit with her eyes though). But I suppose it that would be what she'd look like in the official lineup, maybe it is. Either way, you can just mend that problem by watching Brave and focus on what she really looks like and not how Disney made her look like.

BECAUSE THE WORLD IS FULL OF BONEHEADS

Because they're idiots.