The issue is this"Precognition" word that no one seems to know where it was coined from. The Sharingan's ability is clairvoyance not precognition. Its there in the DB.That's just a Sharingan ability that Sasuke shows more vividly once awakening the third-tomoe.
Nothing to copy when fighting Haku. Haku was a Kekkei Genkai user. Even if Sasuke wanted to copy Haku, it'd be useless.
Sasuke had no trouble seeing through movements before, the issue was that Naruto's speed had increased, but the eyes weren't advanced enough to see through it, despite his body being able to. Sasuke's clairvoyance was merely Kishimoto showing us the Sharingan's precognition in a more vivid sense.
If Kishimoto wanted us to believe the stages granted new abilities, it'd be in the databook.
Of course Sasuke had no problems seeing through movements.. with increased clarity of perception, you are able to track high speeds so except one was as fast as 1T Naruto, 1 and 2T are well able to read/track the movements. Case in point, Haku iirc.
Edit: DB1
Sharingan (Copy Wheel Eye)
Kekkei Genkai, Supplementary, Close to long-range
Users: Hatake Kakashi, Uchiha Sasuke
The Uchiha Clan’s God-given, clairvoyant doujutsu, transmitted by blood!! Seeing through something and duplicating its principles for oneself.
The Kekkei Genkai withheld in the blood of Konoha’s finest lineage, the Uchiha Clan. This unique ability, manifested only in a mere fraction [of people] even within the clan, is characterized by comma-shaped markings in one’s pupils. On top of an all-encompassing insight and powerful hypnosis, these eyes are hosts to a jutsu-copying ability that memorizes the techniques their gaze falls upon in an instant, and replicates them. Just like Kakashi who, in his fight against Zabuza, used it in such a way as to look like he could predict the future; according to their methods of use, the field of variations the caster can apply to their offense and defense expands indefinitely!!
And so on..
Kekkei Genkai, Supplementary, Close to long-range
Users: Hatake Kakashi, Uchiha Sasuke
The Uchiha Clan’s God-given, clairvoyant doujutsu, transmitted by blood!! Seeing through something and duplicating its principles for oneself.
The Kekkei Genkai withheld in the blood of Konoha’s finest lineage, the Uchiha Clan. This unique ability, manifested only in a mere fraction [of people] even within the clan, is characterized by comma-shaped markings in one’s pupils. On top of an all-encompassing insight and powerful hypnosis, these eyes are hosts to a jutsu-copying ability that memorizes the techniques their gaze falls upon in an instant, and replicates them. Just like Kakashi who, in his fight against Zabuza, used it in such a way as to look like he could predict the future; according to their methods of use, the field of variations the caster can apply to their offense and defense expands indefinitely!!
And so on..
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