There are plenty of people playing whose lives have been negatively impacted by violence of some kind and they have to see the glorification of violence and weaponry in Eorzean adventurer culture (not to mention the frequent references to sexual violence and rape in the English localisation). There are also plenty of people playing from conservative backgrounds who are likely all-out shocked by the constant parade of women in eroticised gear like the bunny set and some other popular glamours, but they hold their tongues because there's a perception that 'fan service' content aimed at the straight male gaze is more acceptable than its counterpart aimed at those who appreciate the male form.
Personally, I find it disturbing that an obvious bias exists at all in such an open, inclusive game in the first place, and I don't believe it has ever been the creators' deliberate intent to let this situation happen the way it has; they've generally been deeply accommodating to the 'female gaze' and created a refreshingly relaxed in-game world where everyone can feel welcome. I have a lot of sympathy for the example raised of (especially MtF) trans people who struggle with the sight of people taking what they perceive to be their own struggles with the gender binary and turning it into part of their entertainment, but ultimately this particular issue isn't about trans people (we can freely choose our character's gender) or even crossdressing in the first place (we aren't even asking for an exact clone of the ladies' set and crossdressing has long been possible within FFXIV). They're important issues in society, of course, but in this case I don't see how it matters whether the vulnerabilities of some trans people might justify restricting the freedom of some genderqueer people in case other people might be after the new outfits for the wrong reasons, because it's got nothing to do with the actual thread. In the same way, those with a problem with the ongoing situation with excessive sexualisation of female characters in gaming (which items like the bunny costumes perpetuate) are perfectly entitled to feel that way, but it would be an irrelevant point to bring up in this particular topic and if we don't want anyone to be able to appreciate bodies of any shape or size in sexy clothing I'm afraid that ship sailed a long, long time ago. These complaints should have been raised and debated back when the actual costumes were first being requested.
All this is about is about male characters having a fair counterpart to the female-only bunny costumes as we were promised was coming.