Treasure Map can be good if you plan on using more than 1 copy of Hey, Trunade! as well as other cards that can return set spell/trap cards to your hand like Tornado Bird. Tornado Bird can be good if you use continuous spell/trap cards like Mirror Wall. Use it when your opponent attacks and return it to your hand so you won't have to pay the cost and be able to use it again later.
Since it will also return your own spell and trap cards, it works best when you use quick-play cards that can benefit when you set them and can be activated from your hand during your turn. Enemy Controller can be good in most situations, but it's a dead card against monsters that can't be targeted like toons or hazy monsters, while Super Rush is good against decks with the same monster attributes, but won't do well against diverse ones.
That’s the one plus side to playing mirror wall over wall of d. But some players are dumb enough to actually pay the 2000 life points to keep it up on the field.
when they nerf cards like this one... i think they do it because they know 1% of the players will likely to find a way to create a really op deck... really really op... most of us don't know about it...