I'd think Oro would want Sasuke to improve as much as he could if he was going to use him as a container. I don't think he would allow Sasuke to rely only on the Curse Seal, stunting his development and damaging his body. But that has nothing to do with the discussion since we're only considering pre-time jump Neji/Sasuke (just makes me want to see the improved Sasuke even more!) I still think that If, let's say, Neji had fought Sasuke at the Valley of the End instead of Naruto, Sasuke would have decimated Neji with the ammount of power he had. No contest. This is now evidenced by Naruto being able to attack Orochimaru successfully while at the same stage of power as when he fought Sasuke.
Ha, I'm a Neji fan more than a Sasuke fan, and I still say after Sasuke learned how to use CS level 2, he would kick the shit out of Neji (well, probably anybody below Sannin or Naruto's level at that).
I agree. I'm also a Neji fan, but there's no denying he wouldn't have a chance.