The comparison to Muramasa is fairly interesting now that you bring it up. People were never that outraged by Muramasa, even though it ended up having way more sexist themes without having Dragon's Crown's big boobs. Even
Play magazine's infamous Muramasa cover didn't generate as much outrage and talk as just this thread has.
Of course the answer is simply that "big boobs" are a much easier target of outrage while the more worrisome aspects of these games are too complicated for most posters to bother dealing with.
We probably knew a lot more about the game's gameplay, too, by that point. So even though the allusion to a famous Ukyo-e paining was interesting, we had other things to speak about!
As far as after the game was out... much like this game, styles and designs settle in then, and the only thing one cares to talk about tends up being gameplay related, and even at that, those things are normally mentioned by acceptingalready- fans.
Its not misogynist, no. But it is exploitative, without question. However, you could make the argument that its equally exploitative, regardless of gender. Not sure how that would pan out, but its a legitimate argument one could propose.*
*without checking, I'm betting that the game's marketing sabotages this though.
In a way, I think it boils down to animation. The boobs aren't just attention-getting because they're large for her frame; it's also because of how much emphasis has been put on their motion, reaction, and significance. For Kamitani, I'm sure Expanding Man-thighs and Skin that's so chisled it transforms into ROCK while he breaths is just about equal in expression... to the average viewer? Naaaa...
It just keeps getting better? Wizard next?
I'd bet on either the Elf, or Dwarf. They probably want to avoid putting 2 women, or 2 mages, in a row.