I'd go one step further and say they intentionally make this funnier. The point of this manga isn't boobs out or egregious camel toe, it's the completely psychotic setup and execution being presented in the funniest way possible.
I appreciate the use of "Fall" instead of "Autumn" for the chapter title, even though I'm willing to bet the double meaning wasn't present in the original Japanese title.
Prosthetics can accomplish what's been shown here. You see this with cosplayers sometimes. There was a pretty famous Mai Shiranui a handful of years back that did this, for one example.
It does, however, make for a good shock to the reader's system, to remind us in the midst of all the Cute Girl Does Cool Action Moves that Aria is in the process of exterminating dozens of sapient beings, and the weight that carries.
Well, yes, but statistics and logic are impotent in the face of alcohol (how old is Cordelia The Star School Student again?) and whatever magic Cordelia's subconscious cast on the rest of her.
I'll be honest, you're going to have an extremely difficult time convincing me that a non-trivial portion of the mesugaki correction crowd wants the brat to consent.