Sasuke uses his Chidori and his techniques well and smartly. Naruto is doing that as well. Although Sasuke has been doing it throughout the whole of Naruto, part 1 and part 2. Naruto however, did not until Shippuden.
Sasuke using his techniques piss off people because they don't like the fact Sasuke got stronger.
Yes, I said it what you gonna do?
Naruto's Rasengan, in every way, has been spammed throughout the whole of Naruto. His Kage Bunshin has been spammed as well. Now he's strategically using the techniques, good for him.
Sasuke was only using his MS moves a lot because Kishi needed to show it's power. It wasn't shown well during his fight with Killer Bee. During his fight with A and Danzo however, it was used more, and they were strategically used. Like Naruto's techniques. Some people can't accept that though.