Well let's start with the begining during the batle at Kanami Bridge Kakashi uses Raikiri but Minato told him not to use it again. After he received the Sharingan everything was ok because he could see the enemy's counteratack.
Now wouldn't Sasuke have the same problem without using the Sharingan?
Here we see him clearly going for Naruto with the Chidori without using the Sharingan after he fought with Danzou:
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So I'm just a little confused about the ''rules&risks'' of using Raikiri/Chidori.