Kakashi, since a team leaders, and then shorty lost his team, Obito & Rin.
That is why Kakashi had to visit Rin & Obito very morning, with "Guilt", that he is a lousy team leader.
But now things have change, knowing both Rin & Obito that may forgiven him.
Now, without any guilt in his mind, The "Dark" inside him finally lost to the "Real" him, with fighting spirit will reappeared.
Kakashi is known to have thousand of jutsu he learned, and make use of it, this time, without sharingan eye.
Kakashi family bloodline could may had link to Uchiha bloodline.
Note the he could made full use on sharingan eye and execute the jutsu without problem.
Will not be surprise, he may have the rinnegan eye