Board Thread:Naruto Discussions/@comment-3568954-20170717021343/@comment-5085906-20170717081633

Three reasons why that shouldn't happen:

1) It's morally corrupt. The Shin clones are sentient beings and we were supposed to hate Papa Shin for abusing them.

2) Kakashi's sharingan was a keepsake from his friend whom he thought was deceased. It held quite a lot of emotional value. Kakashi's not the type of guy to harvest a Sharingan just because it would improve his battle stats.

3) Kakashi's not nerfed. Without the Sharingan, he now has more chakra in his disposition and he's already learned how to compensate for not being able to use Chidori/Raikiri with the whole Purple Lightning jutsu. It's for the better - Kakashi's Mangekyou would have gone blind eventually.