Yeah, it'd be nice for less focus on sexualized cosmetics (note: LESS, don't get your pitchforks out yet horny weebs). Even if sex sells, you can only go so far on that alone (or rather, softcore porn) before you actually need to diversify and innovate, otherwise things will stagnate and your playerbase will consist mostly of the handful of whales spamming lolicon SA's in the lobby with their hanger-ons.
But you might be saying "But isn't that where Sega makes most of their revenue from PSO2?", which is true, but at the same time it'd be fairly empty if those were the only people that played the game, and this game leans heavily on its social aspect with lobby actions and showing off ensembles you made.
This may be surprising to some, but not everyone thinks about or wants sex or sexy things in general 24/7, some people like making goofy outfits, while others enjoy playing mecha dressup. Some people like to look edgy, or cute in a non-sexual way. Some people just want to play the game and enjoy the mechanics.
These people might not spend as much money on the game, but they serve the vital purpose of playing the game and keeping the world from being empty. They stimulate the ingame markets and generally fill out the world. They are as much a part of the game as anything else and should be viewed as essential to its well-being.
But the thing is, if you cater too much to one group, others will lose interest and leave and affect the social aspect of the game negatively. Mind you I'm not talking about one or two people leaving, since that is something that happens every day in a game like this. I mean more like losing chunks of the playerbase over time, which of course also happens naturally as well over a game's lifespan, but those that leave due to naturally getting tired of a game and needing a break from it or whatever do tend to come back to check it out again and possibly start getting back into it. Those that drop a game because it is catering towards one group of players (in this case, the group that wants risque outfits for their female characters) tend to develop persistent, negative feelings towards it.
Overall it would be much healthier for PSO2 and NGS to maintain a fine balance between the types of cosmetics you can acquire in them and good for its playerbase as well. It isn't too late for it to correct course and continue maintaining a diverse playerbase.