...I hesitated whether or not to post this, but decided in the end that I probably should. So forgive me for jumping back in, but I feel this needs to be said.
You feel this view marginalizes a large group of people, and that's OK -- you're entitled to that opinion. But I actually hold this opinion for somewhat personal reasons, at least regarding the E3 badge argument.
Back in 2001-2003, I taught at two Japanese junior high schools through the JET Programme, and got to know quite a few of the students while I was there. And there were a sizable number of them who dreamed of becoming pop idols -- male students as well, though admittedly mostly female. They would have pictures with them of the pop idols they looked up to most, and while some were more modest (Mini Moni and the like), there were a few with outfits that I'd peg as distinctly similar to Rise's.
The girls all felt these outfits were incredibly cute, and I recall some mentioning that they were even working on making costumes of their own based on the ones they were seeing. They weren't doing this for the sake of attracting boys, but because they truly desired to wear similar outfits, and look adorable in them, and perform on stage in front of crowds, and become famous. For them, that was an actual dream -- something they were working toward, honing their vocal talents and dance choreography alike after school every single day.
Now, you may say that this dream is the result of a society that encourages women to objectify themselves for fame and glory, and that's fair enough. But actually being there, and seeing the spark in these girls' eyes... I can honestly say that it was making them happy. They were putting tremendous effort into attaining the closest thing to pop idol status they possibly could -- more effort than they put into their schoolwork, honestly -- and the passion they had for this goal was absolutely undeniable.
So when I hear someone say that Rise's outfit on that E3 badge is objectifying, or shows too much skin, or is too sexualized for the character... I can't help but think back to those girls, and imagine you telling THEM that. And if you did... I think they'd be absolutely crushed. They weren't even aware of objectification, or sexualization, or anything of that nature -- they just wanted to look cute, dance in sync with one another, sing bubbly songs, and have fun. Not for anyone else's sake, but for their own.
I feel that when people speak out against this kind of thing, it's like telling these girls that they're wrong for pursuing this particular dream -- that they put their eggs in the wrong basket and should reconsider all their life choices.
In short... I actually feel that public disgust for things like this is, in its own way, marginalizing the hopes and dreams of these girls. It's telling them, "There is only one way a girl should conduct herself, and this is not it." And that's not something you should ever tell a kid -- especially when their dreams are giving them something to be passionate about.
To me, it's kind of like when people made fun of me in high school for playing video games too much.
I just think it's important to keep an open mind, and to understand that while Western culture teaches us that outfits like this are sexual and "wrong," Eastern culture embraces them not for objectification, but for empowerment. It's "girly," sure... but it's something that a lot of girls in Japan really look up to and aspire to emulate, and I genuinely don't think that's wrong. Anything that can bring so many girls so much joy and camaraderie isn't something I can rightfully condemn.
...So yeah, I doubt this will change anyone's mind, but I felt it was something worth sharing, to give a different perspective on things -- and maybe help you understand where I'm coming from a little, if nothing else.
Sorry for the long response!
-Tom