To be honest, I don't mind if the artists are working on not yet released characters
It's actually nice when they release the actual content and most character already have their bust
However, putting the busts on the news page does spoil the surprise of actually seeing them in game for the first time
Also, it creates confusion, and many players will ask "hey, where is this character?" when it does not actually exist for now
I wouldn't mind busts for older characters tho, especially the rusher, and most "one time" characters like the NPCs in Tessa's quest or the coworker/superior of Riya (forgot which one) during her quest too
I honestly think that those characters are "one time" because they don't have busts, if they had busts, maybe people would actually think about creating content for them too