I also suck at slide puzzles like the one in the WW Cabana. However, I had no issue with Sky Keep, and I actually consider it the best dungeon in Skyward Sword. Matching up clear pathways wasn't hard to me. Also, in Wind Waker you only get Rupees for completing the Cabana Slide puzzle, so I've never had motivation to complete it - that might be a factor in why I have problems with it but not with Sky Keep (a dungeon where I had to solve it's slide puzzle to complete the game).