And yet unless they could attack in less than a second before Naruto wakes up what would be the point of them being put in a Genjutsu only to be get hit by a surprised attack..
Theres a common misconception that it doesnt. It can just be easilly dispersed. It will stay active until the tailed beast wakes them up seen here.
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So basically they only have a moment before a perfect jin would wake up. But one moment is enough for skilled genjutsu users like Itachi, and to a lesser extent Sasuke. But we have yet to see his EMS genjutsu prowress. So puttin Naruto against the Uchiha brothers is still suicide