JP side has a thread where players are suggesting being able to take a bath, and also have like a hot spring (onsen - in JP) YoshiP responded to this one.

Original Thread Link: http://forum.square-enix.com/ffxiv/threads/20819

Quote Originally Posted by Naoki_Yoshida View Post
プロデューサ/ディレクタの吉田も温泉が大好き。
MAP大改修のネタには入れときます
Producer/Director Yoshida also likes Onsen (hot spring) a lot.
Will put it as idea for map's large scale modification.

が、効果大きくしちゃうと「インスタンスレイド前には全員温泉入っとけ！」に
なっちゃうので、程度が難しい。そこが悩みどころｗ
BUT, if making the stats too big don't want it to be like "Everyone take a bath (go in hot spring) before instance raid!" so that's the troubling part w