Deva never once said being kicked into a wall affected him, but it did, nevertheless...
And you attribute the breaking of genjutsu to the clone rather than the Sharingan?
When we've seen the Sharingan break genjutsu. And we've seen clones be trapped in genjutsu?
Illogical.
I don't need to prove otherwise, least of all have Kakashi outright state it, because that mechanic was outright stated prior.
There's really no way to determine that whatsoever. He certainly didn't blitz Obito, and Obito's not faster than Itachi.
BM Naruto is using a chakra supplement, just like Itachi uses his Susano'o.
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It's already been stated that using clones, and dividing your power, is a stupid general strategy against strong opponents. They're meant to be used for trickery, and not as an overwhelming force.