It may have not been very creative, but just think about it. The hookshot/longshot/clawshot/whatever else they may call it sometime in the future had been a very common item in the Zelda games. They were bound to put it in TP, and they thought they'd add a little twist to it. Instead of just adding the longshot, which could be used to reach farther away targets just as the double clawshot could do with multiple targets, they added in the double clawshot. With the double clawshot they made new possibilities. They were able to do what the longshot could do and more. It was most certainly a very good idea and an excellent addition to the game, even if it wasn't the most original idea.
I found it an okay tool to use. A single Clawshot to use by itself in TP was a bit of a challenge, but required more thought of when to hook, where to latch onto, etc. Because with only one, your mobility is limited. When I found the second one, I had a ball latching from place to place. But, as some of you have said, Nintendo could've came up with something more creative for the final dungeon before Hyrule Castle. Never the less, it was fun to use.
I think it was an excellent idea, though I think one thing could have made it better: Rock climbing. Sure, we used it on some surfaces, and I like what we had. But one of my favorite bits of Minish cap was being able to actually climb up the mountain. A double clawshot would have been perfect for a 3D version of that. It would also expanded TP's world upward.
Anyway, just wishful thinking. As is, I still think it was a great way to add a twist to a classic item while at the same time keeping it in recognizable form.
Sure, you could be lazy with your thinking and just think that it's lazy of Nintendo to just add a second Clawshot in the City in the Sky, but you aren't thinking about how they were creative in opening up much more options with the Clawshot than they did in the past games with the Hookshot to Langshot translation (or any other name it was given). It allows you you to move by grappling from target to target, and not just to one target.
I think that the Double Clawshot was one of the best things in Twilight Princess, once I had it I alway kept it attached to my B button when another item wasn't needed because it was used the most and was so god damn helpful in the game, it was the same with just the Clawshot to. I loved this item overall, and I think it was an excellent idea, especially with what it allowed us to do in the City in the Sky.
I think it was one of the best items in the game other then the best of all time the bow but i found it fun and clever i bet knowone thought of having two clawshots/hookshots it makes the game funner and makes a good item to get through the dungeon with one the sky temple would be boring and way too easy.