Since I was the one who bought it up.
It wasn't the big boob.
It was the fact that it's a sexualised imagination of a cartoon character that is more covered up than any other character in the actual media it belongs to....with proportions where her boobs are bigger than her head, while making her suck a popsicle that is also dripping on those boobs.
The clothing is stuff she wears in official concept art, in which her breasts are also quite large. The popsicle thing, well we know why that was done, but meh, still don't see it as creepy.