I think that the person in charge of creating more cosmetic and housing things isn't the same as the person in charge of creating more battle content, so more cosmetic doesn't interfere. And do you know that a vast majority of players in this game are only playing for these cosmetic reasons ? What isn't relevant for you might be for others. I myself enjoy both combat and cosmetic aspects of the game and I would be disappointed if they decided to reduce the amount of new cosmetics they add to the game as much as I've been disappointed when I saw that they're only gonna release 2 new expert dungeons per patch since 3.0 instead of the 3 we had before. They shouldn't sacrifice a part of the game for another, they should just hire more people to work on each domain, because they're a really small team of developpers right now.