Lol, don't think so. Itachi still has;
- Superior intelligence
- Faster Handseals
- Superior Genjutsu
- Superior Shurikenjutsu
- Not to mention his OP MS abilities...
Also, Itachi could simply put him a basic Genjutsu and finish him there and then... just because Kakashi's better with Kamui doesn't mean he can take on Itachi...
There is nothing stating that one is superior to the other in intelligence, but you are right in the others.
Basic Genjutsu will not work on Kakashi though, it would definitely have to be Tsukuyomi. I feel that Itachi would still win a battle against Kakashi though, but their MS abilities do have a few differences.
If Itachi is inside Susano'o, then he is still subject to Kamui because Kakashi can still SEE him. On the other hand, Amaterasu can be avoided by going behind another object, which will be Kakashi's only option. In a battle with knowledge like this, Kamui would be set to the same drawback. In a NO knowledge battle, it'd be more in Kakashi's favor. So he can rectify Susano'o with this, and then go toe-to-toe with Amaterasu in terms of long range attacks.
Kakashi CAN use genjutsu pretty well, but he is by no means on Itachi's level.
I say that with Kakashi's new stamina level, he went up to a 35% chance of defeating Itachi. We are basing too much of his power on this fight with Tobi when in reality, it is two Jinchuuriki, himself, and Gai vs a guy whose abilities he can MATCH which no other character really can. Put him in a fight against another opponent and the outcome would be much different, but his stamina HAS improved.