OH GOD SPIRIT TRACKS! While Phantom Hourglass is by no means a bad game, it's really weak by Zelda standards. The dungeons are totally linear (Yes, you could argue that for most recent Zelda titles, but those at least have you pick between doors now and then), the puzzles are laughably easy, which is made even worse since there's usually a signpost telling you exactly what you need to do, and the Temple of the Ocean King is an abomination. And you know what, I actually preferred the sailing in Wind Waker. I felt like I was gallivanting through the high seas on a boat that could take me anywhere, in PH I just draw a line and let the game do the work for me.
While a couple of these problems carried over in Spirit Tracks, the dungeons did at least get harder toward the end.