1.And this matter because?It not like Kakashi regular eye evolved into a sharingan.The eye was given to him, so what's your point?
2.There are many smart shinobi in the series, who are more powerful than Kakashi, so again, what's the point.
3.Kakashi has master three elements,He never used Fire Release in the manga, thus he doesn't have Fire Release.And plenty of shinobi have master multiple element jutsu.Onoki has master Earth,Wind, and Fire. Mei has Water, Earth, and Fire.Darui has Water and Lightning.Kurotsuchi has Earth, Fire, and Water.All those shinobis have master multiple element jutsu plus created nature kekkei Genkai, so Kakashi master three elements isn't that big a deal.
4.Another thing that doesn't matter.Kakashi doesn't have enough chakra to used 20 jutsu, so what's the point of bringing up he copy 1000 jutsu that the majority of them he can't used in battle.Not to mention, the fact that he only copied them thanks to the sharingan, and it is pretty much a given that the majority of those jutsus are D and C rank jutsus that are worthless in battle with any powerful opponent.
5.Again, not a big deal.We have seen many shinobi throughout the series who can fight at all ranges.
6.See #5
7.See #5
8.Amaterasu hasn't killed anyone, but saying a genjutsu hasn't killed anyone is stupid.Tsukuyomi like all genjutsus doesn't killed, but it trap an opponent;given the users the opportunity to killed.If you read the manga from early on you would have known that once Itachi used Tsukuyomi on Kakashi he could have killed him anytime.That is what makes Tsukuyomi so powerful.
9.Not impressive.Lee could open up four gates as a genin.He probably can open up all eight as a chunin.Kakashi opening up one gates doesn't really bring much to the table.What is Kakashi at only one gate, Lee before he open any gates.