Quote Originally Posted by Depression Moon View Post
Dowsing?
It's this power that your companion, Fi, can use to track down important items and characters. Basically it lets you know which direction is the right way to go, but since it's just a radar, it doesn't take things like walls into consideration. So if you're trying to follow the Dowsing readings excessively, you'll end up confusing yourself.

Edit: And no, they definitely haven't dialed back on the puzzle aspects. Rather, the dungeon's layouts just changed in general, and for some reason has veered away from using keys and locked doors.