The problem isn't really having large breasts lol, the problem is why the developers put so many women with large breasts in games. They are not putting them in the game because "real life women with large breast exist", but to cater to gross people. It's also not a "post-gamergate" thing. Shame not even this game could escape pandering (that being said, Mirian is very low on the pandering scale fortunately); I am still excited for it.
I dunno, I think it's a bit cynical to think that kind of thing is always 'pandering.' Sometimes the people making the game just want the character they want in the game - it's not ALWAYS a pure business decision to pander to people. Sometimes an artist just likes breasts and that's that.