ok, 1. we know sasuke is analytical as hell, even back then. He was really good with the sharingan. Sasuke would've found out very quickly that neji HAD a blindspot Then everything he did afterward would be carefully planned to expose said blindspot. Having his mastery with weapons, along with his high speed, it'd be easy enough for him. Unlike lee, sasuke has genjutsu and ninjutsu. Also, going back to the pheonix flower and the wire, imagine if neji used rotation on the wire then sasuke, being the guy he is, would run dragon flame or pheonix flower down the length of the wire, equaling epic failure on nejis part