Alright lets get some stuff straight.
1.The characters aren't real-
Guess what? These characters don't exist in real life. So whatever their supposed age is, which can change because they're not real, it doesn't matter. Just like with 1000 year old vampires in the bodies of a 12 year old, the number on the paper doesn't matter because at the end of the day, it's just a number on a paper. Them being aged up from 15 to 18 doesn't matter because they don't exist. You know what that also means? People saying that other posters liking the original designs are pedophiles, are idiots. Seriously just turn off your computer and stop posting. Just stop and think about what you're typing or just don't post at all. The characters don't have a set age as they're not real. It's not like in real life where people have an objective age that can't be changed at the whim of a writer. The numbers clearly don't matter in this case so why should you? Nothing changes if the character was 15, 18, 20, or 25. So stop getting all indignant and saying that because the fictional character is 15, they shouldn't be sexualized. They don't exist.
2.
It's a mixture of the artstyle chibi and Yoshida's artstyle-
Guess what? They're not sexualizing toddlers but rather, intentionally deformed chibi versions of Yoshida's artwork. Toddlers =/ chibi. Also go back to point 1 in that the characters don't exist and can be whatever age the writers want them to be. Nobody is jerking off to a bunch of pixelated chibi representations of Yoshida's art. The developers are having a bit of fun with the costumes and the game in generally is a bit sexualized. If all you see is toddlers then you need to look at more artstyles. Also if it's embarrassing for you to be playing this game in public, then that's your personal problem that you need to get over.
3.Whatever your opinion of the costume changes, changing of the dialogue to alter tone is unacceptable-
Obviously there will be some changes due to translation work but if they're intentionally trying to tone down innuendo then that is unacceptable. It's demeaning to the audience and it's something that we should be past at this point.
4.Who gives a fuck about the proper definition of censorship?
What people are referring to in this thread is the higherups at Nintendo or SE forcing changes on a work that would not have been done otherwise. Stop making this into a semantics debate and look at the actual issues being discussed.