Kakashi never really used Genjutsu in his fights, never used Kamui unless he really needed too and that's with MS when he had 3 tomoes on mostly and why would he need the precog in all of his fights? If his skills and brains were enough then he wouldn't need to rely on the Sharingan which take a lot of his chakra, in fact it cost him more chakra than it does a Uchiha. It's never stated that Kakashi could use the copied jutsus without the sharingan either so don't say he can if you have no real proof that he can, there's not even other examples to used since Sasuke and Itachi always had their sharingan active when they fought with jutsus they copied. For Lee's taijutsu, Sasuke did copy it but he had to train hard with Kakashi to use it well since he didn't go through the same training as Lee so it cost Sasuke more stamina.
Can you use any manga scans showing or imply Kakashi training to use those jutsus himself without the Sharingan? If not then don't say he can since it's speculation with no explanation or proof he can.
Did it say that was a copy jutsu? Kakashi could have learned that jutsu, he used a doton wall which had dogs on it which goes along with his summons of dogs so him learning earth jutsus does have explanation for it or manga proof since he's not going to copy something that is his summon and there's no one shown with the same summon and he didn't have the Sharingan when his dad was alive if he got it from his dad. He had the Sharingan out but like I said, the dogs make it more like he learned it
You must be registered for see links
. Chidori was just Kakashi's own original jutsu which he created
You missing the point, it requires him to use high speed and he can't "see" his opponents counters at high speed, this was even said about Sasuke when he first shown to use it on Gaara. Read what Lee said here
You must be registered for see links
Sasuke used his Sharingan to dodge Gaara's shand spikes as he was running at him. Minato called it a incomplete jutsu since Kakashi couldn't "see" his opponents counter attacks
You must be registered for see links
.
Doesn't matter how old Kakashi is or how long he had the jutsu, unless he made the jutsu work differently where he doesn't charge and strike his opponent, it's still an incomplete jutsu without the Sharingan. Kakashi can "learn" jutsus, not all jutsus he has are copied, he used a doton wall which have dogs on it, who else have dog summonings? His dad might have but he was dead long before Kakashi got his Sharingan so learning earth jutsus isn't out of the possibility. Kakashi can also learn Shadow clones himself like Naruto did, Kakashi never used a jutsu he shown to copy, without the sharingan being used.
The Sharingan is connected to the brain, the special chakra in the brain is what awakens and level up the Sharingan so for the jutsus/movements copied being used with it active. To use jutsus copied, you have to have the capability or skills needed to use what you're trying to copy. Sasuke had to train hard just to use Lee's taijutsu which takes a lot of stamina from Sasuke since he didn't go through the same amount of training as Lee
You must be registered for see links
and
You must be registered for see links
Kakashi has the nature elements to use the jutsus but he has to train hard to be able to use them just like Lee's taijutsu for Sasuke. The Sharingan is what allow you to memorize the hand signs so is it hard to think that you would need it to utilize what it copies? If Kakashi could use the jutsus without the Sharingan than why does he always need to have the sharingan active when he use what he has shown to copy like the water jutsus he copied from Zabuza and Kisame? Can't be just for it's precognition ability when we have Sakura dodging Sasori's needles with her normal eyes as a chunin so is Kakashi's eyes worst than Sakura's? Shikamaru, Choji and Ino's eyes on par with the Sharingan's eyes to fight against Kakuza and Hidan?
His Sharingan gave him an edge no doubt but it also caused him to waste more chakra and he was seeing the same movements that Shikamaru and Choji were when they were also fighting as chunins. Point is, Kakashi doesn't have to rely on the Sharingan as much as he has if his normal strength was enough and if he could used copied jutsus. He was using the Sharingan against chunin level Naruto and Sakura in the bell test and in the anime he was using his copied jutsus. Kakashi even stated that the Sharingan was weakening his stamina which is his weakness so why use it? A jounin as strong as him is capable of taking care of 2 chunins when they have Kakashi's smarts, experiences, and knowledge of his enemy.