I do wonder whether they are actually happy with bikini tanks or if it's just something they can't block from being an option, given the way the glamour system works. They can't really make seasonal gear anything other than level 1 all-class gear, or it would make it more difficult to wear the outfit at the event – but that means you can also wear it anywhere else.

Also as I see it, regarding aesthetics rather than practical defence, a healer in bikini and tank in bikini are both equally "not wearing proper battle outfits" for their role.