The Double Clawshot was a long needed idea. The Hookshot/Longshot, whatever else it's called, had been long overused. The problem was, like many other weapons in the game, it either came near the end, or it was used at all outside of its own dungeon. Both of these I feel applied to the DC's, for other than a few sparse times in areas such as Hyrule Castle and Palace of Twilight, they weren't overly used, which can be blamed on the other reason. This was the last dungeon item in the game, which severely limited where it could be used, and how it could be used.
At the same time, every time I used them, I felt a need for more.....fluency. If you've ever played through City in the Sky, and remember having to claw from fan to fan, you might know what I'm talking about. I feel they need to improve on that a little bit more, make it more reasonable. I'm all for seeing the DC's in Skyward Sword, or any future Zelda game, providing that they touch up on these issues.