When people start to label something like this as sexist we've gone beyond mere criticism of a game into social ramifications and consequences territory. People can espouse their distaste for art all they want but there will be some backlash when you start positing this or that as sexist. That's why it's better to have, at your disposal, better examples of trends and characters within the industry that reinforce the insidious issue of sexualized characters in games.
In choosing the Sorceress to harp on as emblematic of sexism in gaming, those people have done no favors to us who want to discuss the issue seriously with some nuance. She's a big tittied character, so what? I see plenty of exaggerated figures in the game, it's helmed by one artist who has a penache for fantasy art caricatures. Not only this, the criticisms have been to levy personal attacks against Kamitani and those who enjoy his work.
There is critique which involves deconstructing art in its period, context, discussing artistic intent and whatever other relevant information exists vs flat out calling a character sexist, refusing to engage the people who think otherwise on their terms and acting as if their point of view is the moral high ground as a justification for condescending diatribes. The whole conversation hasn't been about critique for quite some time.