No, because they need to cater for their investors, which means more buyable content.
Making it work with all outfits without clipping or weird stretching takes a lot of time. Think about how many outfits we already have in the game. All of those would need to be changed in order to account for a differently shaped person inside.
And Funcom hasn’t managed to make even their official clothing and hair fully compatible. Long hair still clips through Relic Hunter top’s backpack, for example.