The only thing I hated about Golden Abyss was the touch controls for those 4200 piece (exaggeration) puzzles. I actually didn't mind the aiming, I thought it was well done with the gyroscope but I can see how it can be frustrating. The other thing I disliked was the 'arrow' mechanic. I was hoping for something like Fruit Ninja and how you can swipe all over the place. Other than that, I actually enjoyed UC GA very much and I was surprised that it wasn't made by Naughty Dog. All I know is I enjoyed it far more than I did UC 3 when it came to story. They've all been competent titles that are playable, but it feels like they've improved and/or had some odd design decisions in the later games.
I haven't had any problems with the motion controls when it comes to Golden Abyss though. Only the touch controls when it comes to the arrows and puzzles because what's the point of figuring out a puzzle when Drake only comments on it for like 30 seconds? I at least liked the way you opened up combination locks with the touch controls of the Vita. I can't comment on any of the other difficulties in the game but that's just my experience with the game take it as you will.