Don't tempt TN. We already have costumes with only suspenders and leis covering up the boobs. lol
But, the real answer is kind of complicated. It's about outside perception of the game. People think of DOA as only a game for lonely otakus, complete with waifu dolls that they can fawn over and dress up in bikinis and fetish outfits. There's more about outside perception in the opening post of this thread. While pretty women has been part of the series from the start, it's gotten to the point where barely anybody even knows that DOA is a fighting game. Like, seriously. Some people think that DOA is some volleyball dating sim with ridiculous boob physics. Some people, even throughout this "debacle" are saying things like "if you take away the skimpy outfits, then there's no reason to play DOA."
That's not true. Since we all know it's not, and TN currently may not be doing enough to market things that don't involve boobs, some people are trying to take measures to give the other parts of the game some publicity. It's kind of like do you want a fighting game with a side of cheesecake or cheesecake with a side of fighting game?
People on the outside saw the word "ban" and flew off the rails talking about censorship, and feminazis, and SJWs, and puritanism, and Mortal Kombat and gore WHEN THAT IS NOWHERE NEAR THE POINT OF WHY THIS HAPPENED. Sexiness in itself is fine. But for right now, we're up to our ears in sexy and naughty and dokidoki, etc. So, the "hardcore community" is trying to get people to pay attention to the actual gameplay for a sec.
Now, some people find that they don't like the gameplay. And that's fine. But, we should at least be altering the perception of DOA enough to get people who like other fighting games to try it out. Is this like entrapment or false advertising? I don't quite think so. We're not actually removing anything from the game.
Now, I personally think that a "ban" wasn't the way to go. And I've seen some comments like "I understand what you're trying with this, but there's no point if Team Ninja doesn't actually want to change the perception of the game". I kind of agree with that. It has to start with them.